01091cam a22003131 4500 gs 52000248 DLC 20260227111359.0 850711s1952 bccab b s000 0 eng c gs 52000248 (OCoLC)12256517 U.S. Geol. Survey. Lib. WaChenE WaChenE DLC premarc n-cn-bc TN27 .B72 no. 30 553.61 Cummings, John Moss, 1910- Clay and shale deposits of British Columbia, by J.M. Cummings and J.W. McCammon. Victoria, Printed by D. McDiarmid, Printer to the Queen, 1952. 64 p. illus., maps (part fold.) 26 cm. Bulletin, no. 30 At head of title: British Columbia Department of Mines. Bibliography: p. 45. Clay British Columbia. Shale British Columbia. McCammon, James William, 1916- British Columbia. Department of Mines. Bulletin (British Columbia. Department of Mines) ; no. 30. 28676 28676