01134cam a22002771a 4500001001300000003000400013005001700017008004100034010001700075035001900092040004100111042001200152043001200164050002300176110001800199245006800217260005300285300002800338440007600366500016200442500005100604650003700655710003800692710008900730710003700819gs 14000638 DLC20260227111316.0810422s1914    ilua         s000 0 eng c  ags 14000638   a(OCoLC)7356255  aU.S. Geol. survey LibrarycIdIdDLC  apremarc  an-us-il00aTN805.I3bA4 no. 51 aAndros, S. O.10aMining practice in district I :b(Longwall) /cby S. O. Andros.  aUrbana, [Ill.] :bUniversity of Illinois,c1914.  a42 p. :bill. ;c23 cm. 0aIllinois coal mining investigations cooperative agreement bulletin ;v5  aPrepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering of the University of Illinois, and U. S. Bureau of Mines.  aField work by S. O. Andros and J. J. Rutledge. 0aCoal mines and miningzIllinois.2 aIllinois State Geological Survey.2 aUniversity of Illinois (Urbana-Champaign campus).bDepartment of Mining Engineering.1 aUnited States.bBureau of Mines.