TY  - BOOK
AU  - Whitten, Jeffery L. and Lonnie D. Bentley and kevin C. Ditiman
TI  - Sstem analysis and design methods 
SN  - 817515251
AV  - QA 402  W55 2000
PY  - 2000///
CY  - New Delhi
PB  - Galgotia publications
ER  -