Barrier pillars in Lackawanna Basin northern field : anthracite region of Pennsylvania /
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| Main Authors: | , , , |
|---|---|
| Format: | Book |
| Language: | English |
| Published: |
Washington :
United States Government Printing Office,
1952.
|
| Edition: | 1st ed. |
| ISBN: |
(brož.) |
| Physical Description: |
114 s. + príl. |
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