Subsurface sections across western Pennsylvania / by Charles R. Fettke ...
|Main Author:||Fettke, Charles R. 1888-1959.|
At head of title: ... Commonwealth of Pennsylvania. Dept. of Internal Affairs, William S. Livengood, jr., secretary. Topographic and geologic survey, George H. Ashley, state geologist.
1p.l., 51p.incl.tables :
fold.map, 2 fold.profiles ;
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