Colorado River management plan, Grand Canyon National Park, Arizona /
prepared by Grand Canyon National Park, National Park Service, U.S. Department of the Interior.

APA Citation

United States. National Park Service. (1979). Colorado River management plan, Grand Canyon National Park, Arizona. [Grand Canyon, Ariz.?]: The Park.

MLA Citation

United States. National Park Service. Colorado River Management Plan, Grand Canyon National Park, Arizona. [Grand Canyon, Ariz.?]: The Park, 1979.

Warning: These citations may not always be complete (especially for serials).