TY  - BOOK
AU  - Leffingwell, Dean
AU  - Leffingwell, Dean And Widrig
AU  - Widrig, Don
TI  - Managing software requirements
SN  - 8178082608
U1  - 005.1068 
PY  - 2000///
CY  - Boston
PB  - Addison Wesley
KW  - Computer Programming
KW  - Software Requirements
ER  -