LEADER 02442oam 2200601 450 001 9910711561203321 005 20190118140501.0 035 $a(CKB)5470000002484438 035 $a(OCoLC)761397010 035 $a(EXLCZ)995470000002484438 100 $a20111115d1939 ua 0 101 0 $aeng 135 $aurgn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aMechanization, employment, and output per man in bituminous-coal mining /$fby Willard E. Hotchkiss [and seven others] 210 1$aPhiladelphia, Pennsylvania :$cWork Projects Administration, National Research Project :$cDepartment of the Interior, Bureau of Mines,$d1940. 215 $a1 online resource (2 volumes (xxx, 436 pages)) $cillustrations 225 1 $aMineral technology and output per man studies ;$vreport no. E-9 300 $a"Work Projects Administration, National Research Project, in cooperation with Department of the Interior, Bureau of Mines." 300 $a"August 1939." 300 $aNo FDLP item number available. 320 $aIncludes bibliographical references. 606 $aBituminous coal industry$zUnited States$vStatistics 606 $aBituminous coal mines and mining$xLabor productivity$zUnited States$vStatistics 606 $aCoal miners$xEffect of technological innovations on$zUnited States 606 $aCoal-mining machinery$zUnited States 606 $aCoal miners$2fast 606 $aCoal-mining machinery$2fast 607 $aUnited States$2fast 608 $aStatistics.$2lcgft 615 0$aBituminous coal industry 615 0$aBituminous coal mines and mining$xLabor productivity 615 0$aCoal miners$xEffect of technological innovations on 615 0$aCoal-mining machinery 615 7$aCoal miners. 615 7$aCoal-mining machinery. 700 $aHotchkiss$b Willard E$g(Willard Eugene),$f1874-1956,$01395408 712 02$aNational Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.), 712 02$aUnited States.$bBureau of Mines, 801 0$bOCLCE 801 1$bOCLCE 801 2$bOCLCQ 801 2$bOCLCF 801 2$bOCLCO 801 2$bOCLCQ 801 2$bOCLCA 801 2$bGPO 906 $aBOOK 912 $a9910711561203321 996 $aMechanization, employment, and output per man in bituminous-coal mining$93453893 997 $aUNINA