Add to ORKGPrepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering of the University of Illinois, and U.S. Bureau of Mines.Field work by S.O. Andros and J.J. Rutledge
At head of title: State of Illinois. Department of registration and education. Division of the state...
At head of title: State of Illinois. Department of registration and education. Division of the State...
At head of title: State Geological Survey, Department of Mining Engineering, University of Illinois,...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering,...
Prepared under a cooperative agreement between the Illinois State geological survey division, the En...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
On cover: vol. 1 no. 4.Prepared under a cooperative agreement between State Geological Survey, Dept....
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering,...
Illinois mining investigations prepared under a cooperative agreement between the Illinois State Geo...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
At head of title: State of Illinois. Department of registration and education. Division of the state...
At head of title: State of Illinois. Department of registration and education. Division of the State...
At head of title: State Geological Survey, Department of Mining Engineering, University of Illinois,...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering,...
Prepared under a cooperative agreement between the Illinois State geological survey division, the En...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
On cover: vol. 1 no. 4.Prepared under a cooperative agreement between State Geological Survey, Dept....
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering,...
Illinois mining investigations prepared under a cooperative agreement between the Illinois State Geo...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
At head of title: State of Illinois. Department of registration and education. Division of the state...
At head of title: State of Illinois. Department of registration and education. Division of the State...
At head of title: State Geological Survey, Department of Mining Engineering, University of Illinois,...