01261nam a2200325Ia 4500 119645 BIBL 20160527184942.0 910816s1992 cau b f00010 eng 91030254 DLC DLC n-usc-- EVLG GB1017 .Y67 1992 551.49/0977 20 I 19.16:1405-B 551.49 Y72h Young, H. L. Local 191426 Hydrogeology of the Cambrian-Ordovician aquifer system in the northern midwest, United States by H.L. Young ; with a section on ground-water quality by D.I. Siegel. Washington U.S. G.P.O. 1992. vii, 99 p. U.S. Geological Survey professional paper 1405-B Local 182296 Regional aquifer-system analysis--northern midwest Local 157879 Regional aquifer-system analysis--northern midwest aquifer system Local 157880 Includes bibliographical references. Water, Under ground Middle West. Local 187457 Geology, Stratigraphic Ordovician. Local 101970 Geology, Stratigraphic Cambrian. Local 101970 Aquifers Middle West. Local 53771 100232 100232 0 0 0 551_490000000000000_Y72H 0 evl 71429 10 10 1 2016-05-27 180969 0 551.49 Y72h 80000001302820 2016-05-27 00:00:00 r:119645 z:NCC:D 6