Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering, University of Illinois, and U.S. Bureau of Mines.Mode of access: Internet
Prepared for students of The International Correspondence Schools,Scranton, PA.Mode of access: Inter...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
"Illinois coal mining investigations cooperative agreement" (Report prepared under cooperation with ...
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....
Each volume also has a distinctive title.Mode of access: Internet.Prepared by: Illinois State Geolog...
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 ...
"Illinois coal mining investigations coöperative agreement. (This report was prepared under a coöpe...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between the Illinois State Geological Survey, the Engineering...
Illinois mining investigations prepared under a cooperative agreement between the Illinois State Geo...
"Illinois coal mining investigations, cooperative agreement. (This report was prepared under a coope...
Numbered on cover: Vol. II, no. 1.At head of title: State Geological Survey, Department of Mining En...
Prepared for students of The International Correspondence Schools,Scranton, PA.Mode of access: Inter...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
"Illinois coal mining investigations cooperative agreement" (Report prepared under cooperation with ...
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....
Each volume also has a distinctive title.Mode of access: Internet.Prepared by: Illinois State Geolog...
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 ...
"Illinois coal mining investigations coöperative agreement. (This report was prepared under a coöpe...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
Prepared under a cooperative agreement between the Illinois State Geological Survey, the Engineering...
Illinois mining investigations prepared under a cooperative agreement between the Illinois State Geo...
"Illinois coal mining investigations, cooperative agreement. (This report was prepared under a coope...
Numbered on cover: Vol. II, no. 1.At head of title: State Geological Survey, Department of Mining En...
Prepared for students of The International Correspondence Schools,Scranton, PA.Mode of access: Inter...
Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering ...
"Illinois coal mining investigations cooperative agreement" (Report prepared under cooperation with ...