Clark Wissler (1870¿1947) was curator at the American Museum of Natural History and chairman of the Department of Anthropology at Columbia University. He is the author of North American Indians of the Plains and Man and Culture. Alice Beck Kehoe is the author of many books, including North American Indians: A Comprehensive Account, America Before the European Invasions, and the anthropology textbook Humans. Darrell Kipp (Blackfoot) is the director of the Piegan Institute, whose national objectives are to promote support for Native language issues through advocacy and education and to provide a voice for the national and international dialogue on Native language restoration.