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Thematic maps
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1919
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1. Map showing peat deposits of Itasca County, Minnesota
1919. Minnesota Geological Survey. Scale not given (W 94°25ʹ00ʺ--W 93°03ʹ00ʺ/N 47°53ʹ00ʺ--N 47°01ʹ00ʺ). "Plate IV" in upper right corner. [From Bulletin No. 16, 1919, The Peat Deposi...
2. Soil map, Indiana, Decatur County sheet
1919. Baldwin, Mark (Cartographer), Slipher, J. A., and Jones, S. C. (Sadocie Conellee),1880-cartographer. Shows soil types classification by colors and symbols. 'Field operations Bureau of Soils.' Scale 1:63,360. 1 inch = 1 miles. U.S. Dept. of Agricult...