Shows government or Army landing fields, Navy or Marine landing fields, aerial mail landing fields, municipal landing fields, commercial landing fields, emergency or unimproved landing fields, seaplane landing sites, and the routes of the proposed airway system.; Includes index of 76 landing fields.; "14583."; "4894." on sheet 76 x 112 centimeters Scale ca. 1:4,000,000; 1 inch = 63 miles General Map Collection