Vaughan, T. W. 1899. "Geologic notes on the Wichita Mountains, Oklahoma, and the Arbuckle Hills, Indian Territory." American Geologist, 24 44–55.
The volume documents field work of E. O. Ulrich in the Arbuckle mountains and Wichita mountains of Oklahoma, August 24, - October 24, 1901, June 2- 13, 1928. The notebook begins with a typed index ...