At head of title, 1934-1935: Canada. Dept. of mines. Bureau of economic geology. Geological survey ... ; 1936- : Canada. Dept. of mines and resources ...
At head of title, 1934-1935: Canada. Dept. of mines. Bureau of economic geology. Geological survey ... ; 1936- : Canada. Dept. of mines and resources ... Mines and geology branch ... Bureau of geology and topography ... Geological survey ...