Some sources pertinent to solar house history that are available on the web, ordered roughly by the narrative structure of the book:
**new December 2013
*new November 2013
General Period Sources
1951 HHFA report: Climate and Architecture: Selected References
*1952: "The Possibilities of Solar Energy" from Resources for Freedom (Paley Commission report)
1953: Palmer Putnam book Energy in the Future (full text)
1954 UNESCO report: "Report on the Sources and Uses of Energy in Arid Zones" (pdf)
1955 Mechanix Illustrated article: "Hot News about the Sun"
1955 Popular Science article: "New Sun Furnaces May Cool Houses, Too"
1958: Groff Conklin book The Weather-Conditioned House (full text)
1959 Richard C. Jordan paper: "The Future of Solar Heating"
George Fred Keck and his circle
1933: House of Tomorrow booklet (pdf)
House of Tomorrow HABS documents at Library of Congress
House of Tomorrow archival images on Flickr. [Plan] [Exterior view]
1944 Patent: Radiant Heating for Buildings
*1944: Green's Ready-Made Homes brochure images [cover] [back]
*1944 Popular Mechanics article: "Solar House Reduces Fuel Bills by One-Third"
1945 Popular Mechanics article: "Your Solar Home is all Wrapped Up"
1951: Burnham Kelly book The Prefabrication of Houses (full text); discusses Green's Ready-Made Homes
1991: William Keck oral history
1995: Robert Bruce Tague oral history
Frank Lloyd Wright
1952: Jacobs house II in Built in USA: Post-war Architecture
1992: tour of Jacobs house II including Katherine Jacobs (link to video)
1993: City of Madison Landmarks nomination for Jacobs house II (pdf)
2001: National Register of Historic Places nomination for Jacobs house II (pdf)
1944-45 pamphlet: "Solar Houses: An Architectural Lift in Living"
1946 pamphlet: "Thermopane"
1946 patent: "Method and Apparatus for use in Designing Solar Houses"
1951: Sun Angle Calculator
Your Solar House (1947)
2008 Denzer paper: "The Solar House in 1947" (pdf)
*Harwell Hamilton Harris, California house:  
*Harris Armstrong, Missouri house; 2007 blog by Andrew Raimist:  
Stonorov & Kahn, Pennsylvania house: Archival Image Gallery
Henry N. Wright
1945 full text of Tomorrow's House by Wright and George Nelson; Chapter 15 is "Solar Heating"
2001 Joanna Kendig thesis: "The Ramirez Solar House: A Case Study of Early Solar Design" (pdf)
2008 Tom Solon article: "Rehabilitation of Henry Wright’s Ramirez Solar House"
Arthur T. Brown
Ball-Paylore house archival photos
2010 Denzer paper: "Arthur T. Brown: Pioneer of Passive Solar Architecture" (pdf)
*Archival photos from MIT Museum
1940 Popular Science article illustrated with MIT house 1
1949 Popular Science article featuring MIT house 3
*1949 The Tech article: "Solar House Occupied" (pdf)
*1949 The Tech article: "Tech Family Finds Solar House Life Is Pretty Hot Stuff" (pdf; p.2)
*1950 The Tech article: "Symposium Explores Possibilities Of Solar Heating For Houses" (pdf)
*1950 The Tech article: "Heating Unit Shows Success" (pdf)
1957 article on MIT house 4: "The House that Stores the Sun"
1963 Hottel paper: "Collection of Solar Energy"
1976 Dietz & Czapek paper: "M.I.T. Solar House 2"
*Löf house archival photos: 
1945 patent: Solar Heating Apparatus and Method
1946 Löf report: "Solar energy utilization for house heating"; also here
1958 Popular Science article: "Will Your Next House Get Its Heat from the Sun?"
1963 Löf paper: "The Heating and Cooling of Buildings with Solar Energy"
CSU Solar Village archival photos:  
June 1973 Congressional testimony
March 1974 letter to Congress
1974 Löf paper: "Solar House - Colorado State University"
1974 Löf paper: "The Colorado State University Solar Heated and Cooled House"
1974 Löf and Tybout paper: "The Design and Cost of Optimized Systems..."
September 1975 letter to Congress
1976 Löf paper: "Heating of Buildings with Solar Energy"
1978 Löf paper: “A Problem with Passive” from Congressional Record
2012 Denzer paper: "George Löf: Denver's Solar Pioneer" (pdf)
George Löf house demolition
Original blog post (June 23, 2013)
Reprinted at ASES website (June 27, 2013)
Published in Solar Today (September/October 2013) p.53
Modified for GreenBuildingAdvisor.com (October 1, 2013)
*Maria Telkes archival photos:  
*Dover Sun House archival photos:      
1946 patent: Radiant Energy Heat Transfer Device
1949 Popular Science article featuring Dover Sun House
1951 patent: Composition of Matter for the Storage of Heat
1951 patent: Heat Storage Unit
1952 patent: Method and Apparatus for the Storage of Heat
1952 patent: Apparatus for Storing and Releasing Heat
1980 Popular Science article: "Solar salts"
2010 MIT Article: "The House of the Day After Tomorrow"
Bridgers & Paxton
1974 Frank Bridgers letter to Congress
1974 Stanley Gilman paper: "Solar Assisted Heat Pumps"
1978 Popular Science article: "Higher efficiency with solar-assisted heat pumps"
Raymond W. Bliss
*Bliss house archival photos:  
1954 patent: Solar Water Heating System
1976 Bliss article: "Why not just build the house right in the first place?"
John Yellott / AFASE / Living with the Sun
*1955 article: "A Report on the World Solar Energy Conference" (pdf)
*1958 UNESCO Courier article: "Arizona Builds a Solar House" (pdf; p. 12)
1959 Yellott article: "Heat Your House with Solar Energy"
March 1974 Congressional testimony
1974 Yellott report: "Solar Energy Utilization for Heating and Cooling" (ASHRAE Handbook)
1976 Yellott paper: "Early Tests of the Skytherm System"
1976 Trombe paper: "Some Performance Characteristics of the CRNS Solar House Collectors"
1977 article: "Passive Solar Design Using a Two-Story Trombe Wall"
1977 excerpt: "The Doug Kelbaugh House" from Passive Solar Buildings: A Compilation...
1973 Hay letter to Congress
1973 Mother Earth News interview
March 1974 Congressional testimony
1974 Hay paper: "How to Stop Cooling Loads before they Start"
1975 book excerpt: "Low-Cost Solar Technology---The Work of Harold Hay" (from Wilson Clark, Energy for Survival)
1976 Hay paper: "Atascadero Residence"
1976 Kenneth Haggard paper: "First Cost Economic Evaluation of the Atascadero Skytherm House"
1976 Philip Niles paper: "Modeling the Atascadero House"
1974 patent: Heating and Ventilation System
1975 patent: Solar Collector and Heating and Cooling System
1976 Saunders paper: "Weston Residence"
1976 Saunders paper: "Economics - One View"
1976 patent: Heating, Lighting and Ventilation Systems (Solar Staircase)
1978 patent: Curtain Assembly
1979 patent: Glazing Panel Assembly
1980 patent: Solar Collector and Heating and Cooling System
1980 patent: Solar Energy Fluid Heating System
1983: Christian Science Monitor article on Shrewsbury house
1983 Shurcliff book excerpt: Super Solar Houses: Saunders's 100% Solar, Low-cost Designs (pdf)
October 1973 letter to Congress
August 1975 letter to Congress
1975 book: Solar Heated Buildings: A Brief Survey (7th ed.)
1975 article: "William A. Shurcliff's Advice on Corporate vs. Independent Inventions"
1976 article: "Active-type solar heating systems for houses: a technology in ferment"
1979 book excerpt: Low-Cost Solar Heating -- 100 Daring Schemes Tried and Untried
1980 article: "Carrythrough Time in Passive Houses" (pdf) p.14
1983 book excerpt: Super Solar Houses: Saunders's 100% Solar, Low-cost Designs (pdf)
The 1970s-80s: General Sources
1974 Popular Science article: "Can sunshine heat (and cool) your house?"
**1975 National Research Council of Canada report: Solar Heating - The State of the Art (pdf)
1977 HUD report: Passive Design Ideas for the Energy Conscious Architect
1977 HUD report: Solar Energy and Your Home
1977: Kaiman Lee book: Encyclopedia of Energy-Efficient Building Design: 391 Practical Case Studies
1978: AIA research report: Solar Architecture (pdf)
1978: AIA research report: Passive Technology (pdf)
1978: AIA research report: Passive Solar Design: An Extensive Bibliography
1978: AIA research report: A Survey of Passive Solar Buildings
1978: AIA research report: Regional Guidelines for Building Passive Energy Conserving Homes
1978 DOE report: Building the Solar Home: Some Early Lessons Learned
1979 DOE report: The First Passive Solar Home Awards
1980 SERI report: Passive Design: It's A Natural
1982 report: Path to Passive: Nebraska's Passive Solar Primer (pdf)
New Alchemy publications online
2001 Adam Rome book chapter: "From the Solar House to the All-Electric House"
2012 Jim Laukes presentation: "Notes on the Taproots of Passive House: 1933-1984" (link to video)
History of Insulation & Superinsulation
1944 Univ of Illinois report: "Fuel Savings Resulting from use of Insulation and Storm Windows" (pdf)
1982 McCulley paper: "Energy Monitoring Results of a Superinsulated Passive Solar Building" (pdf)
1982 National Research Council of Canada report: "Thermal Envelope Houses" (pdf)
1983 Brookhaven Natl Lab study: Blouin Superinulated House