TY - BOOK T1 - Hydrologic data for a study of pre-Illinoian glacial till in Linn County, Iowa, water year 1991 DA - 1992. CY - Iowa City, Iowa : CY - Denver, Colo. : AU - Bowman, Phillip R. CN - I 19.76: PB - U.S. Dept. of the Interior, U.S. Geological Survey ; PB - [Books and Open-File Reports Section, distributor], PP - Iowa City, Iowa : PP - Denver, Colo. : PY - 1992. N1 - Distributed to depository libraries in microfiche. N1 - Shipping list no.: 93-1121-M. ID - 240571 KW - Drift KW - Glacial epoch KW - Groundwater flow TI - Hydrologic data for a study of pre-Illinoian glacial till in Linn County, Iowa, water year 1991 ER -