00806cam a22002291 4500 gs 21000302 DLC 20260227111325.0 761027s1921 xx 000 0 eng c gs 21000302 (OCoLC)2532705 U.S. Geol. survey. Library OGraD OCoLC DLC premarc QE185 .A2 no. 123 Cockfield, William Egbert, 1890- Sixtymile and Ladue rivers area, Yukon, by W. E. Cockfield. Ottawa, Thomas Mulvey, printer, 1921. 3 p. l., 60 p. VI pl., fold. col. map, tables. 25 cm. Canada. Geological Survey. Memoir 123. no. 105, Geological series Published also as thesis (Ph. D.) Princeton University, 1918. Geology Yukon. 26109 26109