7th Passive, Progress in Passive Systems – Emery, Ashley

7th Passive, Progress in Passive Systems – Emery, Ashley, Box: 42, Folder: F135. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/89890 Accessed September 18, 2024.