APA

Kolpin D. W., Thurman E. M., . (1995). Postflood occurrence of selected agricultural chemicals and volatile organic compounds in near-surface unconsolidated aquifers in the upper Mississippi river basin, 1993. Washington, DC: United States Government Printing Office.

Chicago

Kolpin Dana W, Thurman Earl M, . 1995. Postflood occurrence of selected agricultural chemicals and volatile organic compounds in near-surface unconsolidated aquifers in the upper Mississippi river basin, 1993. Washington, DC: United States Government Printing Office.

Harvard

Kolpin D. W., Thurman E. M., . (1995). Postflood occurrence of selected agricultural chemicals and volatile organic compounds in near-surface unconsolidated aquifers in the upper Mississippi river basin, 1993. Washington, DC: United States Government Printing Office.

MLA

Kolpin Dana W, Thurman Earl M, . Postflood occurrence of selected agricultural chemicals and volatile organic compounds in near-surface unconsolidated aquifers in the upper Mississippi river basin, 1993. Washington, DC: United States Government Printing Office. 1995.