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Ground subsidence and structural damage over an abandoned room-and-pillar coal mine at Hegeler, IL
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| Other Authors: | |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Pgh. [i.e. Pittsburgh] Pa
U.S. Dept. of the Interior, Bureau of Mines
1986
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| Series: | Information circular
9072 |
| Subjects: | |
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