LEADER 01220nam 2200325Ka 450 001 9910696453403321 005 20080307120321.0 035 $a(CKB)5470000002378307 035 $a(OCoLC)213094092 035 $a(EXLCZ)995470000002378307 100 $a20080307d1997 ua 0 101 0 $aeng 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 00$aPrototype borehole miner selectively extracts gold from permafrost$b[electronic resource] 210 1$a[Washington, DC] :$cU.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health,$d[1997] 215 $a2 unnumbered pages $cdigital, PDF file 225 1 $aTechnology news ;$vno. 460 300 $aTitle from title screen (viewed on Mar. 7, 2008). 300 $a"July 1997." 606 $aPlacer mining$zUnited States 615 0$aPlacer mining 712 02$aNational Institute for Occupational Safety and Health. 801 0$bGPO 801 1$bGPO 906 $aBOOK 912 $a9910696453403321 996 $aPrototype borehole miner selectively extracts gold from permafrost$93164750 997 $aUNINA