Theler, J. L., & Boszhardt, R. F. (2003). Twelve millennia: Archaeology of the upper Mississippi River Valley. University of Iowa Press.
Dyfyniad Arddull ChicagoTheler, James L., and Robert F. Boszhardt. Twelve Millennia: Archaeology of the Upper Mississippi River Valley. Iowa City: University of Iowa Press, 2003.
Dyfyniad MLATheler, James L., and Robert F. Boszhardt. Twelve Millennia: Archaeology of the Upper Mississippi River Valley. University of Iowa Press, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.