APA (7th ed.) Citation

United States. Weather Bureau. (1939). Instructions for airway meteorological service. [s.n.].

Chicago Style (17th ed.) Citation

United States. Weather Bureau. Instructions for Airway Meteorological Service. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Weather Bureau. Instructions for Airway Meteorological Service. [s.n.], 1939.

Warning: These citations may not always be 100% accurate.