[1]
J. C. Frye, N. D. Plummer, R. T. Runnels, and W. B. Hladik, “Ceramic Utilization of Northern Kansas Pleistocene Loesses and Fossil Soils”, kgsbulletin, no. 82, pp. 50–126, Jan. 1949, doi: 10.17161/kgsbulletin.no.82.22013.