APA (7th ed.) Citation

Howle, A. G. (1964). Geology of the Big Brushy canyon area, Brewster County, Texas. [publisher not identified].

Chicago Style (17th ed.) Citation

Howle, Arlen Guy. Geology of the Big Brushy Canyon Area, Brewster County, Texas. [College Station, Tex.]: [publisher not identified], 1964.

MLA (9th ed.) Citation

Howle, Arlen Guy. Geology of the Big Brushy Canyon Area, Brewster County, Texas. [publisher not identified], 1964.