TY  - BOOK
AU  - Edwards,Chris  .
AU  - Bytheway,Andy  .
AU  - Ward,John  .
TI  - Essence of information systems / 
U1  - 005.12 
PY  - 1995///
CY  - New Delhi : 
PB  - Prentice Hall of India , 
KW  - information systems
KW  - System Analysis
ER  -