Subsidence over four room-and-pillar sections in southwestern Pennsylvania / by Noel N. Moebs.
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Format: | Government Document Book |
Language: | English |
Published: |
Pgh. [i.e. Pittsburgh], Pa. :
U.S. Dept. of the Interior, Bureau of Mines,
1982.
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Series: | Report of investigations (United States. Bureau of Mines) ;
8645. |
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