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181   $ctxt$2rdacontent
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200 10$aEnhanced gob gas recovery$b[electronic resource]
210  1$a[Washington, D.C.] :$c[U.S. Environmental Protection Agency],$d[2000]
300   $a"June, 2000."
300   $aTitle from title screen.
606   $aCoal mine waste$zUnited States
606   $aLongwall mining$zUnited States
615  0$aCoal mine waste
615  0$aLongwall mining
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