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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
Karl Menger at the University of Texas at Austin
R.G. Lubben
R. G. Lubben
Karl Menger at the University of Texas at Austin
Karl Menger at the University of Texas at Austin
R.G. Lubben