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Geological map of Michigan Maps maps University Of Michigan university-of-michigan

1916. Smith, Richard A., 1876-1963., Barrett, Leslie Park, 1887-, and A. Hoen & Co. 1 map : col. ; 103 x 85 cm. "A. Hoen & Co. lith. Baltimore, Md.".


Geologic Map of Pigeon Point, Minnesota Maps maps University Of Minnesota university-of-minnesota

1910. Bayley, William Shirley, 1861-1943, A. Hoen & Co., and U.S. Lake Survey. Cartographic Details: Scale 1:22500. "By W.S. Bayley, 1890." Relief shown by contours. Includes 2 cross section insets and legend of rock types. "M... U.S. Geological Survey (Washington, D.C.), 1910.