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181   $ctxt$2rdacontent
182   $cc$2rdamedia
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200 10$aDrilling and dustiness of metal-mine air /$fby D. Harrington
210  1$a[Washington, D.C.] :$cU.S. Department of the Interior, Bureau of Mines,$d1922.
215   $a1 online resource (10 unnumbered pages)
225 1 $aReports of investigations ;$v2339
300   $aAt head of title: Bureau of Mines -- Department of the Interior.
300   $aIncludes tables.
300   $a"Serial no. 2339."
300   $a"March, 1922."
606   $aMine ventilation
606   $aMine dusts
606   $aBoring
615  0$aMine ventilation.
615  0$aMine dusts.
615  0$aBoring.
700   $aHarrington$b D$g(Daniel),$f1878-$01418884
712 02$aUnited States.$bBureau of Mines,
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801  1$bGPO
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