APA (7th ed.) Citation

Geological Survey (U.S.). (1937). Geology and ground-water resources of Duval County, Tex. [s.n.].

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Geology and Ground-water Resources of Duval County, Tex. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

Geological Survey (U.S.). Geology and Ground-water Resources of Duval County, Tex. [s.n.], 1937.