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1. Map of the original swamp areas of the lower peninsula of Michigan.: 1907. Compiled from John Farmer's map of 1873 for report; by C. A. Davis on peat.

1907. Michigan. Geological Survey. From Geological Survey of Michigan. Annual report for 1906. Plate XVI. Swamp areas shown in brown. 1 map: col.; 64 x 52 cm. This map is in the publ...