00923cam a22002651  4500001001300000003000400013005001700017008004100034010001700075035002000092040004800112042001200160050002200172051002600194086001700220100002000237245015300257260002300410300004000433410005400473504002600527650003500553700005200588999001700640gs 55000283 DLC20260227111403.0860228s1955    dcub     b    000 0 eng c  ags 55000283   a(OCoLC)13210014  aU.S. Geol. Survey. Libr.cTxHRdOrAshSdDLC  apremarc00aQE75b.C5 no. 362  aTN805.O7bM3cCopy 2.0 aI 19.4/2:3621 aMason, Ralph S.10aCoal resources of Oregon,cby Ralph S. Mason and Margaret I. Erwin. Prepared in cooperation with the Oregon Dept. of Geology and Mineral Industries.  aWashington,c1955.  aii, 7 p.bmaps (part fold.)c27 cm.10aUnited States.bGeological Survey.tCircularv362  aBibliography: p. 6-7. 0aCoal mines and miningzOregon.1 aErwin, Margaret Isabelle,d1922-ejoint author.  c28990d28990