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100   $a20001010d--------km-y0itay50------ba
101 0 $aita
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200 1 $aPractical guide to respirator usage in industry$fBy Gyan Rajhans, David S.L. Blackwell.
210   $aBoston$cButterworths$dcopyr. 1985
215   $aXIII,161 p., ill., 25 cm
676   $a602
700  1$aRajhans,$bGyan S.
702  1$aBlackwell,$bDavid S.l.
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