00690nam a2200217 4500 1/888 010425s1981 enk eng 0861761359 907 DLC GR-PeUP 384.5 HA Hayden, Virginia. Conflicting perceptions of viewdata and its benefits/ Virginia Hayden Bradford; MCB Publications, 1981 60 p. ill.; 30 cm. Library management ; Include bibliography Videotex systems. Television display systems. Library management ; 2, 4 INST UNIPILB MAIN 20040709 384.5 HA 00116825 00116825 LOAN 0 1