01272cam a22003131  4500001001300000003000400013005001700017008004100034010001700075035001900092040003100111050001800142051002700160082001100187086001600198100003300214245021800247260004800465300004400513410005600557500005400613504002800667650001600695650004700711650006700758650005300825740006300878999001700941gs 55000233 DLC20260227111403.0780505s1954    dcuab    b   f000 0 eng    ags 55000233   a(OCoLC)3863499  aDLCcOClUdISSdOCoLCdDLC00aTN490.A2bO55  aTN490.A2bO55cCopy 2.  a553.490 aI 19.16:2611 aOlson, Jerry Chipman,d1917-00aRare-earth mineral deposits of the Mountain Pass district, San Bernardino County, California,cby J. C. Olson [and others] with a foreword on History of the discovery at Mountain Pass, California, by D. F. Hewett.  aWashington,bU.S. Govt. Print. Off.,c1954.  a75 p.billus., maps (part col.)c29 cm.20aGeological Survey (U.S.).tProfessional paper,v261  aPart of the illustrative matter folded in pocket.  aBibliography: p. 64-65. 0aRare earths 0aGeologyzCaliforniazSan Bernardino County 0aMines and mineral resourceszCaliforniazSan Bernardino County 0aMines and mineral resourceszCaliforniaxHistory0 aMountain Pass district, San Bernardino County, California.  c28971d28971