[Lambert conformal conic projection.] and NOTE.—Since July 1, 1937, aeronautical charts (previously listed in the Monthly catalog under the Air Commerce Bureau as Airway maps) have been published by the Coast and Geodetic Survey instead of the Air Commerce Bureau. They will, in the future, be listed under the Coast and Geodetic Survey as Aeronautical charts.
Notes:
NOTE.—Since July 1, 1937, aeronautical charts (previously listed in the Monthly catalog under the Air Commerce Bureau as Airway maps) have been published by the Coast and Geodetic Survey instead of the Air Commerce Bureau. They will, in the future, be listed under the Coast and Geodetic Survey as Aeronautical charts. † Distribution Made by Issuing Office. 40c.