01024cam a22002531  4500001001300000003000400013005001700017008004100034010001700075035001900092040001900111050001600130100004200146245008600188260006700274300002300341410007100364500012400435500008700559650001000646700004700656700005000703999001700753gs 37000321 DLC20260227111342.0790608r1937uuuuilua         s000 0 eng    ags 37000321   a(OCoLC)5047843  aDLCcTxCMdDLC00aTN933b.G751 aGrim, Ralph E.q(Ralph Early),d1902-14aThe mica in argillaceous sediments,cby R. E. Grim, R. H. Bray and W. F. Bradley.  aUrbana,bPrinted by authority of the state of Illinois,c1937.  a813-829 p.billus.20aIllinois State Geological SurveytReport of investigationsvno. 44  aAt head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey.  a"Reprinted from the American Mineralogist, v. 22, no. 7, pp. 813-829, July, 1937." 0aMica.1 aBray, Roger Hammond,d1898-ejoint author.1 aBradley, William Frank,d1908-ejoint author.  c27406d27406