1. Interview with Mr. Leroy Youngblood of Youngblood Roofing Company, Miami, Florida.
2. Survey of Water Heating,1941
3. Domestic Solar Water Heating in Florida;Hawkins,1947
4. The performance of flat plate solar heat collectors;Hottel;A.S.M.E. Trans.,1942
5. Interview with Mr. William Robbins, Jr., of W. R. Robbins and Son, Inc., Miami, Florida.