Surface formations and agricultural conditions of northwestern Minnesota
By: by Frank Leverett, with a chapter on Climatic conditions of Minnesota, by U.G. Purssell
Contributors: Purssell, Ulysses G.; Geological Survey (U.S.); University of Minnesota
Series: Minnesota. Geological survey. Bulletin -- no. 12.; Bulletin (Minnesota Geological Survey) -- 12.
Publisher: University of Minnesota
Published: 1915
Place of publication: Minneapolis
Language: eng
Number of pages: 78
Subjects: Soils; Climate; Agriculture; Geology
Notes: At head of title: The University of Minnesota.

In coo peration with the United States Geological survey.