01341cam a22003371 4500 gs 17000292 DLC 20260227111321.0 750807s1917 mnuab 000 0 eng gs 17000292 (OCoLC)1521558 DLC OAU OCoLC DLC n-us-mn QE127 .A22 no. 13 Leverett, Frank, 1859-1943. Surface formations and agricultural conditions of northeastern Minnesota, by Frank Leverett and Frederick W. Sardeson, with a chapter on Climatic conditions of Minnesota by U. G. Purssell. Minneapolis, The University of Minnesota, 1917. vi, 72 p. illus. (maps) xv pl. (incl. fold. map in pocket) diagrs. 23 cm. Minnesota Geological Survey. Bulletin no. 13 At head of title: The University of Minnesota. "In cooperation with the United States Geological survey." Geology Minnesota. Agriculture Minnesota. Soils Minnesota. Minnesota Climate. Sardeson, Frederick William, 1866- joint author. Purssell, Ulysses G. University of Minnesota. Geological Survey (U.S.) Bulletin (Minnesota Geological Survey) ; no. 13. 25768 25768