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Hans Friedrich Krausse · Illinois State Geological Survey
54 sayfa · 1979
Coal mines and mining
Hans Friedrich Krausse · E. Pilger
86 sayfa · 1978
Faults (Geology)
![Roof strata of the Herrin [no. 6] coal member in mines of Illinois](https://covers.openlibrary.org/b/id/9807843-L.jpg)