00847cam a22002777a 4500003000500000005001700005008004100022010000900063011000900072035000900081040000900090082001200099100002300111245010100134260007200235300001900307490004100326650003600367650001900403650001600422650002600438650001800464700002200482700002400504830004100528CHAP20220329133244.0971013s1985            r     00010     d  a3999  a4971  a4176  cCHAP  a550bV500aVisocky, Adrian P. 0aGeology, hydrology and water quality of the cambrian and ordovician systems in Northern Illinois  aChampaign, Ill :bDepartment of Energy and Natural Resources,c1985  a136 p.b: ilus 0aCooperative Groundwater Reportv; 1014aAguaxAbastecimientoxIllinois.14aAguaxCalidad.14aGeología.14aGeologíaxIllinois.14aHidrología.0 aCartwright Keros.0 aSherrill, Marvin G.0 aCooperative Groundwater Reportv; 10