As of the late fall of 1968, there are at least 56 radiocarbon dates from eastern Colorado which contribute to our knowledge of the prehistory of this region. They are derived from some 36 localities and have been tabulated and commented upon under the categories of PaleoIndian, Archaic, Early Ceramic, Middle Ceramic, and Late Ceramic.
L.J. SchroderRobert EmersonW.A. Beetem
In YangR L McAvoyRobert Emerson
L.J. SchroderW.A. BeetemHans C. ClaassenRobert Emerson