APA (7th ed.) Citation

Cobb, E. H. (1972). Metallic mineral resources map of the Ophir quadrangle, Alaska. The Survey.

Chicago Style (17th ed.) Citation

Cobb, Edward H. Metallic Mineral Resources Map of the Ophir Quadrangle, Alaska. Reston, Va.: The Survey, 1972.

MLA (9th ed.) Citation

Cobb, Edward H. Metallic Mineral Resources Map of the Ophir Quadrangle, Alaska. The Survey, 1972.