000053603 000__ 00899cam\a2200277W\\4500 000053603 001__ 53603 000053603 005__ 20210513015553.0 000053603 008__ 700129s1969\\\\iluab\\\\b\\\s00010\engm\ 000053603 010__ $$a72-628409 000053603 035__ $$a(OCoLC)ocm00053513 000053603 035__ $$9AAF5176SI 000053603 035__ $$a53603 000053603 040__ $$aDLC$$cDLC$$dm.c.$$dISE 000053603 049__ $$aISEA 000053603 0500_ $$aQE105$$b.A45 no. 441 000053603 082__ $$a557.73/08 s 000053603 1001_ $$aNorth, William G.$$q(William George),$$d1942- 000053603 24514 $$aThe Middle Devonian strata of southern Illinois$$c[by] William G. North. 000053603 260__ $$aUrbana,$$bIllinois State Geological Survey,$$c1969. 000053603 300__ $$a45 p.$$billus., maps.$$c26 cm. 000053603 4901_ $$aIllinois State Geological Survey$$tCircular$$v441 000053603 500__ $$aCover title. 000053603 504__ $$aBibliography: p. 39-40. 000053603 650_0 $$aGeology, Stratigraphic$$yDevonian. 000053603 650_0 $$aGeology$$zIllinois. 000053603 830_0 $$aCircular (Illinois State Geological Survey)$$v441. 000053603 85200 $$bgen$$hQE105$$i.A45$$ino.441 000053603 909CO $$ooai:library.usi.edu:53603$$pGLOBAL_SET 000053603 980__ $$aBIB 000053603 980__ $$aBOOK