00761cam a22002531  4500001001300000003000400013005001700017008004100034010001700075035001900092040004000111042001200151050002100163100003100184245006200215260002300277300003000300410004900330500001700379504003900396650001900435650003600454999001700490gs 50000137 DLC20260227111356.0800116s1949    dcu      b   f000 0 eng c  ags 50000137   a(OCoLC)5878718  aU.S. Geol. Survey. Libr.cMsSMdDLC  apremarc00aQE75b.C5 no. 531 aCombo, John Xavier,d1922-10aCoal resources of Montana,cby John X. Combo [and others]  aWashington,c1949.  a28 p. :billus. ;c27 cm.20aGeological Survey (U.S.).tCircular,vno. 53  aCover title.  a"Selected bibliography": p. 24-26. 0aCoalzMontana. 0aCoal mines and miningzMontana.  c28468d28468