TY  - GEN
AU  - Sommerville, Ian
AU  - Sommerville, Ian
TI  - Software Engineering. 5th Ed. 
SN  - 9 790201 435794
U1  - 004.41 SOM 
PY  - 1998///
CY  - England
PB  - Addison-Wesley publishing
KW  - System engineering
KW  - Software engineering
ER  -