United States. Civil Aeronautics Board. Office of Facilities and Operations. (1969). Routes to United States authorized to foreign air carriers of Eastern Hemisphere countries under permit, December 31, 1969.
Chicago Style (17th ed.) CitationUnited States. Civil Aeronautics Board. Office of Facilities and Operations. Routes to United States Authorized to Foreign Air Carriers of Eastern Hemisphere Countries Under Permit, December 31, 1969. [Washington, 1969.
MLA (8th ed.) CitationUnited States. Civil Aeronautics Board. Office of Facilities and Operations. Routes to United States Authorized to Foreign Air Carriers of Eastern Hemisphere Countries Under Permit, December 31, 1969. 1969.
Warning: These citations may not always be 100% accurate.