John A. N. Lee John Impagliazzo Lillian N. Cassel Edward A. Fox C. Lee Giles Deborah Knox Manuel A. Pérez-Quiñones Enhancing distance learning using quality digital libraries and CITIDEL. 61-71 2003 conf/ifip3-6/2003 Quality Education @ a Distance db/conf/ifip3-6/ifip3-6-2003.html#LeeICFGKP03