Folder 38: Offprints by Hagen, J.G.,, 1886-1904 & [No Date]

Folder 38: Offprints by Hagen, J.G.,, 1886-1904 & [No Date], Box: 5, Folder: 38. Georgetown Observatory Collection, GRB-000010. Georgetown University Rare Books , Booth Family Center for Special Collections. https://findingaids.library.georgetown.edu/repositories/14/archival_objects/1163438 Accessed December 07, 2025.