01020cam a22002651 4500 gs 23000240 DLC 20260227111327.0 760331m19231928oncabf f001 0 eng c gs 23000240 (OCoLC)2083105 U.S. Geol. Survey. Libr. NAlfC OCoLC DLC premarc TN948.S6 C3 1923 Canada. Mines Branch (1901-1936) Silica in Canada; its occurrence, exploitation and uses, by L. Heber Cole. Ottawa, Government Printing Bureau, 1923-28. 2 v. illus., plates, fold. maps, tables. 25 cm. At head of title, pt. I-II: Canada. Department of Mines. Hon. Charles Stewart, minister; Charles Camsell, deputy minister. Mines branch, John McLeish, director. Seven folded maps in pocket of pt. I. No. 555, 686. pt. I. Eastern Canada.--pt. II. Western Canada. Silica. Cole, Lionel Heber, 1883- 26261 26261