The measurement of educational products
Whipple, Guy Montrose, 1876-1941; Ayres, Leonard Porter, 1879-1946; Thorndike, Edward L. (Edward Lee), 1874-1949; Haggerty, Melvin E. (Melvin Everett), 1875-1937; Ballou, Frank Washington; Nifenecker, Eugene Alexander; Ashbaugh, Ernest James; Buckingham, B. R. (Burdette Ross), b. 1876; Courtis, Stuart A. (Stuart Appleton), 1874-1969; Melcher, George; Judd, Charles Hubbard, b. 1873; Bryner, Edna