Readability : Its past, present, and future - Samuels, S. Jay; Zakaluk, Beverly L.; Fry, Edward B.; Zakaluk, Beverly L.; Chall, Jeanne S.; Davison, Alice; Binkley, Marilyn R.; Rabin, Annette T.; Samuels, S. Jay; Klare, George R. (IRA, 1988)