Mexico air navigation map.
United States.War Department.General Staff.
Fort Humphreys, D.C., Engineer Reproduction Plant,
1933-
"Map no. 3507"
[U.S. Army Map Service. A.M.S. F401].
Set includes various issues of some sheets.
Elevations are indicated in meters by contours and altitude tints.
In addition to aeronautical information, four classes of roads or trails, three classes of railroads, and telephone and telegraph lines are shown.
By Geographic Branch, Military Intelligence Division (G-2) General Staff, U.S.A.
Marginal diagrams: Relative reliability.--Sheet index.
Aeronautical charts