United States. Aeronautical Chart Service & United States. Army Air Forces. (1947). Political & time chart: Northern Hemisphere (First edition. August 1946 (ACS). Revised January 1947 (ACS).). U.S. Army Air Forces.
Chicago Style (17th ed.) CitationUnited States. Aeronautical Chart Service and United States. Army Air Forces. Political & Time Chart: Northern Hemisphere. First edition. August 1946 (ACS). Revised January 1947 (ACS). [Washington D.C.]: U.S. Army Air Forces, 1947.
MLA (9th ed.) CitationUnited States. Aeronautical Chart Service and United States. Army Air Forces. Political & Time Chart: Northern Hemisphere. First edition. August 1946 (ACS). Revised January 1947 (ACS). U.S. Army Air Forces, 1947.
Warning: These citations may not always be 100% accurate.