TY - BOOK AU - Kolpin, Dana W. AU - Burkart, M. R. AU - Thurman, E. M. CN - I 19.76: CY - Iowa City, Iowa : CY - Denver, Colo. : DA - 1993. ID - 198461 KW - Herbicides KW - Nitrates KW - Groundwater KW - Groundwater N1 - Chiefly tables. N1 - Running title: Data for reconnaissance of herbicides and nitrate, midcontinental United States, 1991. N1 - Distributed to depository libraries in microfiche. N1 - Shipping list no.: 94-0205-M. 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 - 1993. T1 - Hydrogeologic, water-quality, and land-use data for the reconnaissance of herbicides and nitrate in near-surface aquifers of the midcontinental United States, 1991 TI - Hydrogeologic, water-quality, and land-use data for the reconnaissance of herbicides and nitrate in near-surface aquifers of the midcontinental United States, 1991 ER -