Class E7-E10 Transparencies, Box: 14, Folder: F9. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections.
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Class E7-E10 Transparencies, Box: 14, Folder: F9. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/88681 Accessed September 07, 2024.