United States. Office of Strategic Services. Research and Analysis Branch. United States. Board of Economic Warfare. North Decimal Degree -7.610556. South Decimal Degree -33.773889. East Decimal Degree -34.799167. West Decimal Degree -73.985556. Industrial Engineering Division, Project No. ENG-90. "Map no. 2062.""Restricted." Includes: graphs showing coal production in major fields from 1935-1942 and location map.