APA (7th ed.) Citation

Schaap, B. D. (1999). Concentrations and possible sources of nitrate in water from the Silurian-Devonian aquifer, Cedar Falls, Iowa. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Schaap, Bryan D. Concentrations and Possible Sources of Nitrate in Water from the Silurian-Devonian Aquifer, Cedar Falls, Iowa. Iowa City, Iowa: U.S. Department of the Interior, U.S. Geological Survey, 1999.

MLA (9th ed.) Citation

Schaap, Bryan D. Concentrations and Possible Sources of Nitrate in Water from the Silurian-Devonian Aquifer, Cedar Falls, Iowa. U.S. Department of the Interior, U.S. Geological Survey, 1999.