01350cam a22003131  4500001001300000003000400013005001700017008004100034010001700075035001900092040003100111042001200142050002200154051002600176082001100202086001600213100005000229245024900279260004800528300006400576410005600640500007900696504003800775650003800813650004000851650004400891650005600935700004500991gs 54000292 DLC20260227111402.0780708s1953    dcuabd   b   f000 0 eng    ags 54000292   a(OCoLC)4032119  aDLCcOClUdISSdOCoLCdDLC  apremarc00aQE75b.P9 no. 245  aTN490.T9bL6cCopy 2.  a553.460 aI 19.16:2451 aLovering, T. S.q(Thomas Seward),d1896-1991.00aGeology and ore deposits of the Boulder County tungsten district, Colorado,cby T. S. Lovering and Ogden Tweto. [Prepared in cooperation with the State of Colorado through the Colorado Geological Survey board and the Colorado Metal Mining Fund]  aWashington,bU.S. Govt. Print. Off.,c1953.  aviii, 199 p.billus., maps, diagrs., plans, tables.c29 cm.20aGeological Survey (U.S.).tProfessional paper,v245  aPart of the illustrative material is folded, part colored, part in pocket.  a"List of references": p. 192-196. 0aGeologyzColoradozBoulder County 0aPetrologyzColoradozBoulder County 0aTungsten oreszColoradozBoulder County 0aTungsten mines and miningzColoradozBoulder County1 aTweto, Ogden,d1912-1983,ejoint author.