Chan, J.M.T. creator Korostoff, Marilyn. text S.l.] SAGE Publications, Inc 1984 monographic 94 p. Computer-assisted instruction--Programming 0803923139 (paperback) 9780803923133 (paperback) http://www.amazon.com/exec/obidos/ASIN/0803923139/chopaconline-20 http://www.amazon.com/exec/obidos/ASIN/0803923139/chopaconline-20