Calculations and Ideas on Solar Energy, KWB, Box: 59, Folder: F6. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections.
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Calculations and Ideas on Solar Energy, KWB, Box: 59, Folder: F6. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/90323 Accessed September 16, 2024.
