00817cam a22002411  4500001001300000003000400013005001700017008004100034010001700075035001900092040001900111050002100130051001600151100003800167245005500205260005500260300005700315410004700372502008800419504002800507650002300535999001700558gs 21000131 DLC20260227111325.0760412s1919    xx            000 0 eng    ags 21000131   a(OCoLC)2107060  aDLCcTxEUdDLC00aQE91b.A4 no. 17  aQE92.T9bH61 aHowell, J. V.q(Jesse V.),d1891-10aTwin lakes district of Colorado,cby J. V. Howell.  aDenver, Col.,bEames bros., state printers,c1919.  a108 p.billus., fold. map in pocket, diagrs.c23 cm.20aColorado Geological Survey.tBulletin,v17  aThe author's dissertation, University of Iowa, 1922, but not published as a thesis.  aBibliography: p. 16-17. 0aGeologyzColorado.  c26082d26082