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Surface formations and agricultural conditions of the south half of Minnesota, by Frank Leverett and Frederick W. Sardeson, with a chapter on Climatic conditions in Minnesota, by U.G. Purssell.
By: Leverett, Frank, - Purssell, Ulysses G. - Sardeson, Frederick W. - Geological Survey (U.S.) - University of Minnesota.
Publication info: Minneapolis,The University of Minnesota,1919.
Contributed by: Library of Congress