APA (7th ed.) Citation

Smith, C. W. (1950). A study of range sites and condition classes in Presidio County to determine their influence on the poisonous plant population. [publisher not identified].

Chicago Style (17th ed.) Citation

Smith, Curtis W. A Study of Range Sites and Condition Classes in Presidio County to Determine Their Influence on the Poisonous Plant Population. [Place of publication not identified]: [publisher not identified], 1950.

MLA (9th ed.) Citation

Smith, Curtis W. A Study of Range Sites and Condition Classes in Presidio County to Determine Their Influence on the Poisonous Plant Population. [publisher not identified], 1950.