At head of title: United States Department of commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, director.Mode of access: Internet
At head of title: United States Dept. of the interior, Harold L. Ickes, secretary. Bureau of mines, ...
At head of title: U.S. Department of Commerce, R.P. Lamont, secretary. Bureau of Mines. Scott Turner...
At head of title: Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, dir...
At head of title: U.S. Department of Commerce. R.P. Lamont, secreatary. Bureau of Mines. Scott Turne...
At head of title: U.S. Dept. of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, dir...
At head of title: United States Department of the Interior. Harold L. Ickes, secretary. Bureau of Mi...
At head of title: U.S. Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner...
At head of title: U.S. Department of commerce. R. P. Lamont, secretary. Bureau of mines. Scott Turne...
At head of title: U.S. Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner...
At head of title: United States Dept. of the Interior, Harold L. Ickes, secretary. Bureau of Mines,...
At head of title: U.S. Department of Commerce. Daniel C. Roper, secretary. Bureau of Mines. Scott Tu...
At head of title: United States Dept. of the interior. Harold L. Ickes, secretary. Bureau of mines. ...
At head of title: United States Department of Commerce. R. P. Lamont, secretary. Bureau of Mines. Sc...
At head of title: U.S. Department of Commerce. Daniel C. Roper, secretary. Bureau of Mines. Scott Tu...
At head of title : U.S. Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turne...
At head of title: United States Dept. of the interior, Harold L. Ickes, secretary. Bureau of mines, ...
At head of title: U.S. Department of Commerce, R.P. Lamont, secretary. Bureau of Mines. Scott Turner...
At head of title: Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, dir...
At head of title: U.S. Department of Commerce. R.P. Lamont, secreatary. Bureau of Mines. Scott Turne...
At head of title: U.S. Dept. of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, dir...
At head of title: United States Department of the Interior. Harold L. Ickes, secretary. Bureau of Mi...
At head of title: U.S. Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner...
At head of title: U.S. Department of commerce. R. P. Lamont, secretary. Bureau of mines. Scott Turne...
At head of title: U.S. Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner...
At head of title: United States Dept. of the Interior, Harold L. Ickes, secretary. Bureau of Mines,...
At head of title: U.S. Department of Commerce. Daniel C. Roper, secretary. Bureau of Mines. Scott Tu...
At head of title: United States Dept. of the interior. Harold L. Ickes, secretary. Bureau of mines. ...
At head of title: United States Department of Commerce. R. P. Lamont, secretary. Bureau of Mines. Sc...
At head of title: U.S. Department of Commerce. Daniel C. Roper, secretary. Bureau of Mines. Scott Tu...
At head of title : U.S. Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turne...
At head of title: United States Dept. of the interior, Harold L. Ickes, secretary. Bureau of mines, ...
At head of title: U.S. Department of Commerce, R.P. Lamont, secretary. Bureau of Mines. Scott Turner...
At head of title: Department of Commerce. R.P. Lamont, secretary. Bureau of Mines. Scott Turner, dir...