Studies of the thickness of the plastic layer of coals : its determination and significance / by M.J. Kovalik, D.E. Wolfson, and F. Fischler.
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Format: | Government Document Book |
Language: | English |
Published: |
[Washington, D.C.] :
U.S. Dept. of the Interior, Bureau of Mines,
1964.
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Series: | Report of investigations (United States. Bureau of Mines) ;
6568. |
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