"Provisional" GSGS (Series) ; 2758. 1st ed. - AMS 2. "Prepared under the direction of the Chief of Engineers, U.S. Army, by the Army Map Service (PT) ... 1943. Copied from a U.S.S.R. map, Chelkar, 1:1,000,000. Boundaries revised to 1939. Transliteration of Russian place names in accordance withe system of teh Permanent Committee on Geographical names, 1942." Modified polyconic projection.
