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|a Relationship between sulfur in coals and the occurrence of marine roof beds /
|c E. G. Williams and M. L. Keith.
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| 260 |
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|a ,
|c 1963
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| 504 |
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|b 43 refs.
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| 504 |
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|b 43 refs.
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|a Williams, Eugene G..
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|a Keith, M. L..
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|a p. 720-729
|c 25 cm.
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|c AR-RiUNS
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| 866 |
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| 773 |
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|t ECONOMIC Geology and the bulletin of the Society of Economic Geologists
|w E1
|g Vol. 58, n. 5 (Aug. 1963)
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| 942 |
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|c PP
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| 999 |
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|c 23086
|d 23086
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