APA (7th ed.) Citation

Walker, K. R. (1970). The stratigraphy, environmental sedimentology, and community ecology of the Middle Ordovician Black River Group New York State. University Microfilms.

Chicago Style (17th ed.) Citation

Walker, Kenneth Russel. The Stratigraphy, Environmental Sedimentology, and Community Ecology of the Middle Ordovician Black River Group New York State. Ann Arbor: University Microfilms, 1970.

MLA (9th ed.) Citation

Walker, Kenneth Russel. The Stratigraphy, Environmental Sedimentology, and Community Ecology of the Middle Ordovician Black River Group New York State. University Microfilms, 1970.