00766cam a22002171  4500001001300000003000400013005001700017008004100034010001700075035001900092040004000111050002300151051001700174100003100191245008300222260009500305300003800400410004500438504002800483650003700511gs 65000326 DLC20260227111417.0760128s1965    dcuab    b   f000 0 eng c  ags 65000326   a(OCoLC)1951608  aU.S. Geol. Survey Libr.cTxDaMdDLC00aQE75b.B9 no. 1191  aQE92.B4bH351 aHansen, Wallace R.,d1920-14aThe Black Canyon of the Gunnison,btoday and yesterday,cby Wallace R. Hansen.  a[Washington,bFor Sale by the Superintendent of Documents, U. S. Govt. Print. Off.,c1965]  avii, 76 p.billus., maps.c24 cm.20aGeological Survey (U.S.)tBulletinv1191  aBibliography: p. 75-76. 0aGeologyzColoradozBlack Canyon.