01264cam a22003251 4500 gs 38000173 DLC 20260227111343.0 780808s1938 oruab b s000 0 eng c gs 38000173 (OCoLC)4120322 U. S. Geol. Survey. Libr. NcRS NcRS DLC premarc n-us-or x3x3 TN942 .W54 285 s B no. 6 Wilson, Hewitt, 1891- Preliminary report of some of the refactory clays of western Oregon, by Hewitt Wilson and Ray C. Treasher. [Portland, Ore.] 1938. iv, 93 p. illus., maps. 28 cm. Oregon. State Dept. of Geology and Mineral Industries. Bulletin no. 6 "This paper presents the results of work done under a cooperative agreement between the Bureau of Mines, the University of Washington and the Oregon State Department of Geology and Mineral Industries." Photoprinted. Bibliographical foot-notes. Clay Oregon. Clay industries Oregon. Treasher, Raymond Clarence, 1898- joint author. Refactory clays of western Oregon, Preliminary report. 27457 27457