Instructions for airway meteorological service.
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TextSeries: Circular NPublication details: Washington, U.S. Govt. print. off., 1935.Edition: Third edition. 1935Description: vi, 142 p. illus., diagrs. 24 cmSubject(s): LOC classification: - TL556 .U6 1935
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At head of title: U. S. Department of agriculture. Weather bureau.
Earlier editions have title: Instructions for airway observers.
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