“The Economics of Solar Home Heating,” U.S. Congress, 1977

“The Economics of Solar Home Heating,” U.S. Congress, 1977, Box: 67, Folder: F254. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/90587 Accessed September 11, 2024.