Amer. nat. biog. online, June 3, 2009 (Judd, Charles Hubbard; b. Feb. 23, 1873, Bareilly, India; d. July 19, 1946, Santa Barbara, Calif.; doctorate, Leipzig; Yale University, professor and director of the school's psychology laboratory, 1907-9; director of the School of Education, University of Chicago, 1909-1938)
BGMI, June 3, 2009 (Judd, Charles Hubbard (1873-1946))
Laboratory equipment for psychological experiments, 1907 t.p. (Charles Hubbard Judd)
LC in RLIN, 5/6/94 (hdg.: Judd, Charles Hubbard, 1873- )
LC, Nov. 4, 2003 (hdg.: Judd, Charles Hubbard, 1873-1946)