The peat deposits of Minnesota - Soper, Edgar Kirke, 1886-; Geological Survey (U.S.); United States. Bureau of Mines (Minneapolis, The University of Minnesota, 1919)
At head of title: The University of Minnesota ... In coöperation with the United States Geological survey and the United States Bureau of mines.
Published also as thesis (Ph. D.) University of Minnesota, 1917, with title: The origin, occurrence, and uses of Minnesota peat.
Bibliography: p. [254]-256.
Keywords: Peat -- Minnesota