00444pamaa2200145 4500 0000014980 20060511090000.0 1850321574 371.358 COL LB1044.84 COL 1996 COLLIS Tele-learning in a digital world : the future of distance learning Dr. Betty Collis. London: Internationa Thomson Computer Press, 1996. xix, 651p.: 25cm. Distance education