000012020 000__ 01061cam\a2200313\i\4500
000012020 001__ 12020
000012020 005__ 20210512014318.0
000012020 008__ 790416s1978\\\\ilua\\\\\b\\\s00010\engm\
000012020 010__ $$a78-624069
000012020 035__ $$a(OCoLC)ocm04129480
000012020 035__ $$a12020
000012020 040__ $$aDLC$$cDLC$$dm.c.$$dIEP
000012020 043__ $$an-us-il
000012020 049__ $$aISEA
000012020 0500_ $$aQE105$$b.A45 no. 502$$aQE660
000012020 090__ $$aQE662$$b.W5
000012020 092__ $$a557.73
000012020 1102_ $$aIllinois State Geological Survey.
000012020 24514 $$aThe Platteville and Galena groups in northern Illinois /$$cH. B. Willman, Dennis R. Kolata.
000012020 260__ $$aUrbana :$$bIllinois State Geological Survey,$$c1978.
000012020 300__ $$a75 p. :$$bill. ;$$c28 cm.
000012020 4901_ $$aIllinois State Geological Survey circular ; 502
000012020 504__ $$aBibliography: p. 73-75.
000012020 650_0 $$aGeology, Stratigraphic$$yOrdovician.
000012020 650_0 $$aGeology$$zIllinois.
000012020 7001_ $$aWillman, H. B.$$q(Harold Bowen),$$d1901-
000012020 7001_ $$aKolata, Dennis R.,$$ejoint author.
000012020 7102_ $$aIllinois State Geological Survey.
000012020 830_0 $$aCircular (Illinois State Geological Survey) ;$$v502.
000012020 85200 $$bgen$$hQE662$$i.W5
000012020 909CO $$ooai:library.usi.edu:12020$$pGLOBAL_SET
000012020 980__ $$aBIB
000012020 980__ $$aBOOK