found: Frank Bennett Fiske photographs of Dakota Indians, circa 1900s-1920s
found: Brigham Young University, L. Tom Perry Special Collections worksheet, Oct. 31, 2008(John Grass; Teton Lakota chief)
found: Biographical Dictionary of American Indian History to 1900, 2001:p. 147 (John Grass; Pezi; Mato Watakpe; b. ca. 1837; d. 1918)
found: American Indian Biographies, 2005:p. 191 (John Grass; Pezi; Mato Watakpe; Charging Bear; d. May 10, 1918 in Standing Rock Reservation, N.D.)
found: Johansen, Bruce E. The encyclopedia of Native American biography, 1997:pages 152-153 (John Grass; Pezi. Spoke a number of Dakota dialects as well as English. Over Chief Sitting Bull's objections, Grass signed an 1889 agreement that broke up the Great Sioux Reservation. Served as head judge in the Court of Indian Offenses of the Standing Rock Reservation.)
