At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turner, director."Selected bibliography": p. 87-89.Mode of access: Internet
At head of title: Department of Commerce. Bureau of Foreign and Domestic Commerce. Julius Klein, dir...
At head of title: U.S. Dept. of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, dir...
"Department of Commerce. Herbert Hoover, secretary. Bureau of Mines. Scott Turner, director."Cover h...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: Department of commerce. Herbert Hoover, secretary. Bureau of mines. D. A. Lyon, ac...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of Commerce. Herbert Hoover, secretary. Bureau of Mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: U.S. Department of commerce. Roy D. Chapin, secretary. Bureau of mines. Scott Turn...
Includes index (p. 89-94).At head of title: ... Department of commerce. Herbert Hoover, secretary. B...
At head of title: U.S. Department of commerce. Daniel C. Roper, secretary. Bureau of mines. Scott Tu...
At head of title: Department of Commerce. Bureau of Foreign and Domestic Commerce. Julius Klein, dir...
At head of title: U.S. Dept. of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, dir...
"Department of Commerce. Herbert Hoover, secretary. Bureau of Mines. Scott Turner, director."Cover h...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: Department of commerce. Herbert Hoover, secretary. Bureau of mines. D. A. Lyon, ac...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of Commerce. Herbert Hoover, secretary. Bureau of Mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turn...
At head of title: U.S. Department of commerce. Roy D. Chapin, secretary. Bureau of mines. Scott Turn...
Includes index (p. 89-94).At head of title: ... Department of commerce. Herbert Hoover, secretary. B...
At head of title: U.S. Department of commerce. Daniel C. Roper, secretary. Bureau of mines. Scott Tu...
At head of title: Department of Commerce. Bureau of Foreign and Domestic Commerce. Julius Klein, dir...
At head of title: U.S. Dept. of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, dir...
"Department of Commerce. Herbert Hoover, secretary. Bureau of Mines. Scott Turner, director."Cover h...