APA

Herbert E G., . (1917). Geology of the Navajo Country a reconnaissance of Parts of Arizona, New MÚxico, and Utah. Washington: Government Printing Office.

Chicago

Herbert E Gregory, . 1917. Geology of the Navajo Country a reconnaissance of Parts of Arizona, New MÚxico, and Utah. Washington: Government Printing Office.

Harvard

Herbert E G., . (1917). Geology of the Navajo Country a reconnaissance of Parts of Arizona, New MÚxico, and Utah. Washington: Government Printing Office.

MLA

Herbert E Gregory, . Geology of the Navajo Country a reconnaissance of Parts of Arizona, New MÚxico, and Utah. Washington: Government Printing Office. 1917.