Bradt, Helmut L., University of Rochester, to R.R.W., C. U., re sending one 100micron Ilford plate exposed for 4 and 1/2 h. at 100,000 feet [tls]; reply, 6/22/1948 [cc], 5/19/1948

Bradt, Helmut L., University of Rochester, to R.R.W., C. U., re sending one 100micron Ilford plate exposed for 4 and 1/2 h. at 100,000 feet [tls]; reply, 6/22/1948 [cc], 5/19/1948, Box: 1, Folder: 49. Robert R. Wilson papers, 14-22-3093. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/222416 Accessed July 16, 2025.