APA (7th ed.) Citation

Verstraeten, I. M., McGuire, V. L., & Heckman, K. L. (1998). Hydrogeology and subsurface nitrate in the Upper Big Blue Natural Resources District, central Nebraska, July 1995 through September 1997. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Verstraeten, I. M., Virginia L. McGuire, and K. L. Heckman. Hydrogeology and Subsurface Nitrate in the Upper Big Blue Natural Resources District, Central Nebraska, July 1995 Through September 1997. Lincoln, Neb.: U.S. Dept. of the Interior, U.S. Geological Survey, 1998.

MLA (9th ed.) Citation

Verstraeten, I. M., et al. Hydrogeology and Subsurface Nitrate in the Upper Big Blue Natural Resources District, Central Nebraska, July 1995 Through September 1997. U.S. Dept. of the Interior, U.S. Geological Survey, 1998.