Spengler, Robert N., III. 2013. Botanical Resource Use in the Bronze and Iron Age of the Central Eurasian Mountain/Steppe Interface: Decision Making in Multi-resource Pastoral Economies, Ph.D. Dissertation for the Anthropology Department at Washington University in St. Louis.
Spengler, Robert N., III. 2008. Archaeobotanical Analysis of the Begash Site: Plants as a Component of Mobile Pastoralism. St. Louis: Unpublished Master’s Thesis, available in the Anthropology Department at Washington University.