Preliminary report on the clays and shales of Minnesota
By: by Frank F. Grout and E.K. Soper.
Contributors: Soper, Edgar Kirke, 1886- joint author.; Geological Survey (U.S.); University of Minnesota.
Series: Minnesota. Geological survey.  Bulletin 11
Publisher: The University of Minnesota
Published: 1914
Place of publication: Minneapolis
Language: eng
Number of pages: 175
Subjects: Clay -- Minnesota.
Notes: At head of title: The University of Minnesota.
In cooperation with the United States geological survey.