APA (7th ed.) Citation

Weir, G. W., & Greene, R. C. (1965). Clays Ferry formation (Ordovician) -- a new map unit in south-central Kentucky. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Weir, Gordon W., and Robert C. Greene. Clays Ferry Formation (Ordovician) -- a New Map Unit in South-central Kentucky. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1965.

MLA (9th ed.) Citation

Weir, Gordon W., and Robert C. Greene. Clays Ferry Formation (Ordovician) -- a New Map Unit in South-central Kentucky. United States Department of the Interior, Geological Survey, 1965.