Water quality in the Upper Mississippi River Basin, Minnesota, Wisconsin, South Dakota, Iowa, and North Dakota, 1995-98 /
by J. R. Stark...[et al.].
- [Reston, Virginia]: [U. S. Geological Survey], [U. S. Department of the Interior] [2000].
- iv, 35 p. : ill., maps, tables ; 28 cm.
- 1211 .