1. Weathering rinds on andesitic and basaltic stones as a Quaternary age indicator, Western United States Author/Creator: Colman, Steven M. Publication/Creation: Washington : U.S. Govt. Print. Off, 1981 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 1207-1211. Access & Availability: Loading
2. Weathering rinds on andesitic and basaltic stones as a Quaternary age indicator, western United States Author/Creator: Colman, Steven M., author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1981 Resource Type: Book Access & Availability: Loading
3. World bibliography and index of quaternary tephrochronology Author/Creator: Westgate, John A. Publication/Creation: [Edmonton, Alberta] : University of Alberta, 1974 Resource Type: Book Access & Availability: Loading