TY  - BOOK
AU  - Walker,D.W.(David William),1943-
TI  - Computer based information systems: an introduction 
SN  - 0080400663
PY  - 1989///
CY  - Sydney
PB  - Pergamon Press
KW  - Electronic data processing
KW  - System design
KW  - Information storage and retrieval systems
ER  -