LEADER 01278nam 2200349 450 001 9910704557203321 005 20130604101958.0 035 $a(CKB)5470000002442132 035 $a(OCoLC)841580222 035 $a(EXLCZ)995470000002442132 100 $a20130503d2012 ua 0 101 0 $aeng 135 $aurmn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aDistrict field change requests for adding proximity detection systems 210 1$a[Arlington, Virginia] :$c[U.S. Department of Labor, Mine Safety and Health Adminstration],$d2012. 215 $a1 online resource (3 pages) 225 1 $aProcedure instruction letter ;$vno. I12-V-19 300 $aTitle from subject line (viewed on May 3, 2013). 300 $a"Effective Date: 07/26/2012, Expiration Date: 03/31/2014." 606 $aMining machinery$xSafety regulations$zUnited States 606 $aMine safety$xSafety regulations$zUnited States 615 0$aMining machinery$xSafety regulations 615 0$aMine safety$xSafety regulations 801 0$bGPO 801 1$bGPO 906 $aBOOK 912 $a9910704557203321 996 $aDistrict field change requests for adding proximity detection systems$93259402 997 $aUNINA