Description: "Production of coal in North America in 1913 and approximate outlines [in red] of coal fields other than lignite... Each dot represents 1 per cent of world's production. [x] Represents 1/2 to 1/10 per cent of world's production. [v] Represents less than 1/10 per cent of world's production." — Department of the Interior, 1921
Place Names: A Complete Map of North America, Bahamas, Canada, Cuba, Mexico, United State
ISO Topic Categories: boundaries,
economy
Keywords: Production of Coal in North America, physical, political, statistical, physical features,
geological, country borders, industry,
economic, boundaries,
economy, Unknown, 1913
Source: Department of the Interior , World Atlas of Commercial Geology (Washington, DC: Department of the Interior , 1921) Plate 2
Map Credit: Courtesy the private collection of Roy Winkelman |
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