APA (7th ed.) Citation

Howard, W. A. (1966). Trinchera distribution in the Sierra Madre Occidental, Mexico. Dept. of Geography, University of Denver.

Chicago Style (17th ed.) Citation

Howard, William A. Trinchera Distribution in the Sierra Madre Occidental, Mexico. Denver, CO: Dept. of Geography, University of Denver, 1966.

MLA (9th ed.) Citation

Howard, William A. Trinchera Distribution in the Sierra Madre Occidental, Mexico. Dept. of Geography, University of Denver, 1966.