In 1978, Douglas R. Parks, David S. Rood, and Raymond J. DeMallie engaged in systematic linguistic research at the Sioux and Assiniboine reservations to establish the precise dialectology of the Sioux language.
Mais en 1978, Douglas R. Parks, David S. Rood e Raymond J. DeMallie dedicáronse á investigación lingüística sistemática nas reservas síux e assiniboine para establecer a dialectoloxía precisa da lingua síux.