1. Regional geologic map of the Shungnak and southern part of the Ambler River quadrangles, Alaska Yale Public content 1968. 2012-10-11T14:09:18Z. 2012-10-11T14:09:18Z. Patton, William Wallace, 1923-. U.S. Geological Survey. English. Public. Alaska, Selawik River Region, and Kobuk River Region.