1. Abel, T. J. (1999). A temporal and spatial analysis of the Parker Festooned ceramic type. Midcontinental Journal of Archaeology 24: 201?256.
2. Ahler, S. R., and DePuydt, P. J. (1987). A Report on the 1931 Powell Mound Excavations, Madison County, Illinois, Reports of Investigations, No. 43, Illinois State Museum, Springfield.
3. Alex, L. M. (2000). Iowa?s Archaeological Past, University of Iowa Press, Iowa City.
4. Alexander, R. T. (1998). Afterword: Toward an archaeological theory of culture contact. In Cusick, J. G. (ed.), Studies in Culture Contact: Interaction, Culture Change, and Archaeology, Occasional Paper No. 25, Center for Archaeological Investigations, Southern Illinois University, Carbondale, pp. 476?495.
5. Ambrose, S. H. (1993). Isotopic analysis of paleodiets: Methodological and interpretive considerations. In Sandford, M. K. (ed.), Investigations of Ancient Human Tissue: Chemical Analyses in Anthropology, Gordon and Breach Science, Langhorne, PA, pp. 59?130.