00932cam a22002171  4500001001300000003000400013005001700017008004100034010001700075035001900092040001900111050001600130100004200146245010500188260002900293300002300322410007100345500021100416500007700627650001000704gs 42000235 DLC20260227111348.0790608r1942uuuuilua         s000 0 eng    ags 42000235   a(OCoLC)5048490  aDLCcTxCMdDLC00aQE471b.G731 aGrim, Ralph E.q(Ralph Early),d1902-10aModern concepts of clay materials,cby Ralph E. Grim. Printed by authority of the state of Illinois.  aUrbana, Illinois,c1942.  a225-275 p.billus.20aIllinois State Geological SurveytReport of investigationsvno. 80  aAt head of title: State of Illinois, Dwight H. Green, Governor. Department of Registration and Education, Frank G. Thompson, Director. Division of the State Geological Survey, M. M. Leighton, Chief, Urbana.  a"Reprinted from the Journal of Geology, vol. I, no. 3, April-May, 1942." 0aClay.