“Summary of Solar Radiation Observations,” Tabular Summaries, Boeing, 1964

“Summary of Solar Radiation Observations,” Tabular Summaries, Boeing, 1964, Box: 68, Folder: F290. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/90623 Accessed September 12, 2024.