Mann, Alfred K., University of Pennsylvania, to R.R.W., C. U., re ThC" source [tls]; reply, 1/21/1957 [cc], 1/2/1957

Mann, Alfred K., University of Pennsylvania, to R.R.W., C. U., re ThC" source [tls]; reply, 1/21/1957 [cc], 1/2/1957, Box: 2, Folder: 138. Robert R. Wilson papers, 14-22-3093. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/223874 Accessed July 21, 2025.