Rotary drilling holes in coalbeds for degasification /
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Author / Creator: | Cervik, Joseph. |
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Imprint: | [Pittsburgh, Pa.?] : U.S. Dept. of the Interior, Bureau of Mines, [1975] |
Description: | 21 pages : digital, PDF file. |
Language: | English |
Series: | Report of investigations ; 8097 Report of investigations (United States. Bureau of Mines) ; 8097. |
Subject: | |
Format: | E-Resource U.S. Federal Government Document Book |
URL for this record: | http://pi.lib.uchicago.edu/1001/cat/bib/7258691 |