APA (7th ed.) Citation

Walker, L. G. (1982). The brachiopod genera Hebertella, Dalmanella, and Heterorthina from the Ordovician of Kentucky. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Walker, Laurence G. The Brachiopod Genera Hebertella, Dalmanella, and Heterorthina from the Ordovician of Kentucky. Washington: United States Department of the Interior, Geological Survey, 1982.

MLA (9th ed.) Citation

Walker, Laurence G. The Brachiopod Genera Hebertella, Dalmanella, and Heterorthina from the Ordovician of Kentucky. United States Department of the Interior, Geological Survey, 1982.