State solar legislation.
United States.National Solar Heating and Cooling Information Center.
United States.Energy Research and Development Administration.
United States.Department of Housing and Urban Development.
Franklin Institute (Philadelphia, Pa.).Laboratories for Research and Development.
[Rockville, Md.] : National Solar Heating and Cooling Information Center,
[1977]
"Operated by the Franklin Institute Research Laboratories for Energy Research and Development Administration and U.S. Dept. of Housing and Urban Development."
Solar energy
Solar energy