Digital Maps and Geospatial Data | Princeton University
International, overseas and territorial air routes of United States carriers: March 31, 1959
- Washington, D.C. : [s.n.], 1959.
United States. Civil Aeronautics Board. Bureau of Air Operations, Routes Division. North Decimal Degree 90.000000. South Decimal Degree -90.0000. East Decimal Degree 180.0000. West Decimal Degree -180.0000. Ancillary mapw: Caribbean area.; Dominican Republic, Puerto Rico, and Virgin Islands; Hawaiian Islands. "Routes shown on this map do not necessarily conform to air tracks of actual operation.".
- Air travel, Airways, and World—Maps
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