TY - BOOK AU - Sleeman, Phillip J. AU - Cobun, Ted C. AU - Rockwell, D.M. TI - Instructional media and technology: : A guide to accountable learning systems SN - 0582280400 U1 - 371.3078 PY - 1979/// CY - New York: PB - Longman Inc., KW - Educational technology KW - Life science KW - Media design KW - Media selection ER -