Early, Tom, Saperstein, Lisa, Payne, John, Macleod, Robb, and Sterrenberg, Beate, 2002, Kanuti NWR/Ray Mountains/Hogatza River earth cover classification: U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK; Ducks Unlimited, Inc.: Anchorage, AK, United States (USA).