TY  - BOOK
AU  - Sommerville,Ian
AU  - Sawyer,Pete H.
TI  - Requirements engineering: a good practice guide 
SN  - 0471974447
AV  - QA76.6 S6453
PY  - 1997///
CY  - Chichester, England
PB  - J. Wiley
KW  - Ingeniería de software
KW  - Normas
ER  -