TY  - BOOK
AU  - Leffingwell, Dean
AU  - Yourdon, Ed
TI  - Managing software requirements : : a unified approach 
SN  - 9780201615937 (Hbk)
U1  - 005.1068 
PY  - 2000///
CY  - Boston : 
PB  - Addison-Wesley
KW  - Computer software--Development--Management
N1  - Includes index
ER  -