APA (7th ed.) Citation

Siegel, D. I. (1989). Geochemistry of the Cambrian-Ordovician aquifer system in the northern Midwest, United States. U.S. G.P.O. ; For sale by the Books and Open-File Reports Section, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Siegel, Donald I. Geochemistry of the Cambrian-Ordovician Aquifer System in the Northern Midwest, United States. Washington : Denver, CO: U.S. G.P.O. ; For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1989.

MLA (8th ed.) Citation

Siegel, Donald I. Geochemistry of the Cambrian-Ordovician Aquifer System in the Northern Midwest, United States. U.S. G.P.O. ; For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1989.