01072cam a22002771a 4500 gs 27000138 DLC 20260227111331.0 760927s1926 mnua b s001 0 eng c gs 27000138 (OCoLC)2466150 U.S. Geol. Survey. Library. TxEU MnHi DLC premarc n-us-mn QE127 .A22 no. 21 Grout, Frank F. (Frank Fitch), 1880- The geology and magnetite deposits of northern St. Louis County, Minnesota / by Frank F. Grout. Minneapolis : University of Minnesota, 1926. x, 220 p., 12 leaves of plates : ill. ; 23 cm. Bulletin / the University of Minnesota, Minnesota Geological Survey ; no. 21 Includes bibliographical references. Geology Minnesota Saint Louis County. Magnetite Minnesota Saint Louis County. Iron ores Geology Minnesota Saint Louis County. Bulletin (Minnesota Geological Survey) ; no. 21. 26558 26558