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Portrait of Dr. and Mrs. Hallett, Margaret, Rebecca, Henry, George (student of R. L. Moore at the University of Pennsylvania), [and ?] ge (student of R. L. Moore at the University of Pennsylvania, [?]
Karl Menger (left) and Dr. Nicolas Hofreiter
Lida B. May
Mary Ellen Estill Rudin with her two children [?]
Charles Watson Vickery
Spirals
Unidentified man in front of Greeley Electrical Supply Co.
Frank William Halsted
Unidentified man
Unidentified man with boy
Unidentified woman and boy
Fifth Prague Topological Symposium
Fifth Prague Topological Symposium
Fifth Prague Topological Symposium
Fifth Prague Topological Symposium
Unidentified group photo
Unidentified children
Oliver 'Pet' Halsted
Arthur Halsted
Karl Menger at the University of Texas at Austin