APA

Ward L. W., United States Geological Survey, . (1985). Stratigraphy and characteristic mollusks of the Pamunkey Group (lower tertiary) and the Old Church Formation of the Chesapeake Group-Virginia Coastal Plain. Washington, DC: US Gov. Print. Off.

Chicago

Ward Lauck W, United States Geological Survey, . 1985. Stratigraphy and characteristic mollusks of the Pamunkey Group (lower tertiary) and the Old Church Formation of the Chesapeake Group-Virginia Coastal Plain. Washington, DC: US Gov. Print. Off.

Harvard

Ward L. W., United States Geological Survey, . (1985). Stratigraphy and characteristic mollusks of the Pamunkey Group (lower tertiary) and the Old Church Formation of the Chesapeake Group-Virginia Coastal Plain. Washington, DC: US Gov. Print. Off.

MLA

Ward Lauck W, United States Geological Survey, . Stratigraphy and characteristic mollusks of the Pamunkey Group (lower tertiary) and the Old Church Formation of the Chesapeake Group-Virginia Coastal Plain. Washington, DC: US Gov. Print. Off. 1985.