1. U.V. fluorescence as a relative age indicator in Knife River flint artifacts;Ahler,1991
2. Prehistoric Exchange Systems in North America,1994
3. Spectroscopy of rocks and minerals, and principles of spectroscopy;Clark,1999
4. Lithic Resource Studies: a Sourcebook for Archaeologists;Church,1994
5. Prehistoric Quarries and Lithic Production,1984