National Bureau of Standards—System of Solar Energy Conversion for Houses, 1972

National Bureau of Standards—System of Solar Energy Conversion for Houses, 1972, Box: 36, Folder: F179. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/89722 Accessed July 26, 2024.