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Cornell University. Department of Physics(1)
H.H. Wills Physics Laboratory (1927-)(1)
International Cosmic Ray Conference (4 : 1955 : Guanajuato, Mexico) / Guanajuato, Mexico (4 : 1955 : Guanajuato) (1955-)(1)
International Council of Scientific Unions. Special Committee for the International Geophysical Year(1)