International Mathematics Congress 1932
International Congress on Theoretical Physics 1956
ION Fall Meeting 1945
ION Eastern Regional Meeting 1949
ION Annual Meeting Luncheon 1951
ION National Meeting Dinner 1951
Fifth IAU General Assembly
Fourth IAU General Assembly
40 Inch Telescope Mounting Souvenir
Society of Rheology Annual Meeting
Fourth Solvay Conference on Physics
Society for Natural Philosophy E1
OSA Meeting Banquet 1952
Participants in Climate Control Panel
AVS 60th International Symposium and Exhibition
Council and Commissioners of the American Meteorological Society


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