01059cam a22003131 4500 gs 43000002 DLC 20260227111348.0 780808s1942 oruab b s000 0 eng c gs 43000002 (OCoLC)4120153 U. S. Geol. Survey. Libr. NcRS NcRS DLC premarc n-us-or x4x4 QE155 .A3 no. 23 TN473.O7 H3 Copy 2. 553.45 Harrison, Harold Charles, 1907- An investigation of the reported occurrence of tin at Juniper Ridge, Oregon, by H. C. Harrison. With geology by John Eliot Allen. [Portland] 1942. [56] p. illus., maps. 28 cm. Oregon. State Dept. of Geology and Mineral Industries. Bulletin no. 23 Reproduced from type-written copy. "References" at end of each chapter except the last. Tin ores Oregon. Tin ores Analysis. Allen, John Eliot, 1908- 27864 27864