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*1001 $aWolf, Edward C.$0(NO-TrBIB)90380311$_46392800
*24510$aOn the brink of extinction :$bconserving the diversity of life$cEdward C. Wolf
*260  $aWashington$bWorldwatch Institute$c1987
*300  $a53 s.
*4901 $aWorldwatch paper$v78
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