TY  - BOOK
AU  - Sommerville,Ian
AU  - Sawyer,Pete
TI  - Requirements engineering: a good practice guide 
SN  - 0471974447
AV  - QA 76.76 .D47S668 1999
U1  - 005.1 21
PY  - 1997///
CY  - Chichester
PB  - Wiley
KW  - Systems engineering
KW  - Software engineering
ER  -