Postflood occurrence of selected agricultural chemicals and volatile organic compounds in near-surface unconsolidated aquifers in the upper Mississippi River Basin, 1993 / by Dana W. Kolpin and E. Michael Thurman.
Imprint
[Washington, D.C.] : U.S. G.P.O. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : Free on application to the USGS Information Services [distributor], 1995.