1. People of the Willows: The Prehistory and Early History of the Hidatsa Indians;Ahler,1991
2. Chemical Analysis of Ecological Material;Allen,1974
3. Chemical and isotopic techniques of diet reconstruction in eastern North America;Ambrose,1987
4. Isotopic analysis of paleodiets: methodological and interpretative considerations;Ambrose,1993
5. Minnesota Archaeological Society,1979