Van Nest, J., 2006. Rediscovering This Earth: Some Ethnogeological Aspects of the Illinois Valley Hopewell Mounds, in: Charles, D., Buikstra, J. (Eds.), Recreating HopewellUniversity Press of Florida, Gainesville, Florida. pp. 402-426.

Van Nest, J., Charles, D., Buikstra, J., Asch, D., 2001. Sod Blocks in Illinois Hopewell Mounds. American Antiquity 66, 633-650. doi:10.2307/2694177