Folder 46: Items and Letters Sent to Francis J. Heyden,, 1950 - 1957

Folder 46: Items and Letters Sent to Francis J. Heyden,, 1950 - 1957, Box: 6, Folder: 46. Georgetown Observatory Collection, GRB-000010. Georgetown University Rare Books , Booth Family Center for Special Collections. https://findingaids.library.georgetown.edu/repositories/14/archival_objects/1163498 Accessed December 08, 2025.