APA (7th ed.) Citation

Kalkhoff, S. J. (1994). National Water-Quality Assessment Program--Eastern Iowa Basins. U.S. Geological Survey, Dept. of the Interior.

Chicago Style (17th ed.) Citation

Kalkhoff, Stephen J. National Water-Quality Assessment Program--Eastern Iowa Basins. [Reston, Va.]: U.S. Geological Survey, Dept. of the Interior, 1994.

MLA (9th ed.) Citation

Kalkhoff, Stephen J. National Water-Quality Assessment Program--Eastern Iowa Basins. U.S. Geological Survey, Dept. of the Interior, 1994.