Hidden Bibliographic Details
| Varying Form of Title: | IGY upper air charts at stratospheric levels July 1957-Dec. 1958
IGC upper air charts at stratospheric levels Jan.-June 1959
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| Other uniform titles: | International Geophysical Year, 1957-58.
International Geophysical Cooperation.
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| Frequency: | Monthly
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| Date / volume: | July 1957-June 1959.
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| Notes: | Issues for July 1957-Dec. 1958 cover period of the International Geophysical year; Jan.-June 1959 is a continuation of the International Geophysical Year and includes the first six months of the International Geophysical Cooperation.
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