TY  - BOOK
AU  - EDWARDS ,C/ WARD ,J./ BYTHEWAY,A..
TI  - ESSENCE OF INFORMATION SYSTEM
SN  - 81-203-1056-X
U1  - 658.4038 
PY  - 2003///
CY  - NEW DELHI
PB  - PRENTICE HALL OF INDIA
ER  -