Preliminary report on the clays and shales of Minnesota,
Grout, Frank F. 1880-
Preliminary report on the clays and shales of Minnesota, by Frank F. Grout and E.K. Soper. - Minneapolis, The University of Minnesota, 1914. - viii, 175 p. illus., plates, fold. map, fold. tab., diagrs. 23 cm. - Minnesota. Geological survey. Bulletin 11 .
At head of title: The University of Minnesota. In cooperation with the United States geological survey.
gs 15000336
Clay--Minnesota.
TN942 / .G8
Preliminary report on the clays and shales of Minnesota, by Frank F. Grout and E.K. Soper. - Minneapolis, The University of Minnesota, 1914. - viii, 175 p. illus., plates, fold. map, fold. tab., diagrs. 23 cm. - Minnesota. Geological survey. Bulletin 11 .
At head of title: The University of Minnesota. In cooperation with the United States geological survey.
gs 15000336
Clay--Minnesota.
TN942 / .G8