The International Geophysical Year

Front:
IGY CH ICAGO THE INTEMPLATIO PHYSICAL YEAR 28, 1999 COURTESY I. B. M. 31 9:00 A.M. 1958 ILL. ANNEE GEOPHYSICU INTERNATIO A THE INTERNATIONAL GEOPHYSICAL YEAR 1957 GEOPHYSICAL YEAR AR ACTIVITY METERGLORY 12 SOMOSPHERE PHYSICS COSMIC RAYS THE SALOMONS 1957-58 INTERNATIONAL GEOPHYSICAL YEAR 3c 000000OOO 19

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