00925cam a22002411i 4500001001300000003000400013005001700017008004100034010001700075035001900092040001900111042001200130050001600142082001000158100004700168245009200215260009400307300005300401490009700454490007700551650003800628999001700666gs 39000194 DLC20260227111344.0790706s1939    pauab        s000 0 eng    ags 39000194   a(OCoLC)5144332  aDLCcMsSMdDLC  apremarc00aTN24.P4bM9  a338.21 aMyers, W. M.q(William Marsh),d1892-1951.00a... Problems and trends in the mineral industries of Pennsylvania /cby W. M. Myers ...  aState College, Pa.,bSchool of Mineral Industries, The Pennsylvania State College,c1939.  axiv, 77 p.billus. (map) tables, diagrs.c23 cm.0 aPennsylvania.  State College.  Mineral Industries Experiment Station.  Bulletin 17 [i.e. 27]0 aThe Pennsylvania state college bulletin,vvol. 33, no. 34, June 26, 1939 0aMineral industrieszPennsylvania.  c27561d27561