Media type: E-Article Title: Adaptive features of a CAL system based on information retrieval Contributor: Grahne, Gösta imprint: Elsevier BV, 1982 Published in: Computers & Education Language: English DOI: 10.1016/0360-1315(82)90018-5 ISSN: 0360-1315 Keywords: Education ; General Computer Science Origination: Footnote: