TY  - BOOK
AU  - Whitten,Jeffrey L.
AU  - Bentley, Lonnie D. and Barlow, Victor M. 
TI  - Systems analysis [and] design methods / 
U1  - 004.21 23
PY  - 1989///
CY  - New Delhi : 
PB  - Galgotia Publications pvt ltd, 
KW  - System analysis.
KW  - System design.
ER  -