TY  - BOOK
AU  - Walker,D.W.
TI  - Computer based information systems : an introduction
SN  - 0080344356
U1  - QA/76 
PY  - 1988///
CY  - Sydney
PB  - Pergamamon Press
KW  - Electronic data processing.
KW  - Information storage and retrieval systems.
ER  -