TY  - BOOK
AU  - Whitten, Jeffrey L; Bentley, Lonnie D; Barlow, Victor M.
TI  - Systems analysis and design methods
U1  - 004.21 WHIJ 
PY  - 1991///
CY  - New Delhi
PB  - Galgotia Publications Pvt Ltd
KW  - System Analysis & Design
ER  -