TY  - BOOK
TI  - Networks 
T2  - Infotech state of the art report 
SN  - 008-028559-7
PY  - 1981///
CY  - England: 
PB  - Pergamon Infotech Limited, 
KW  - System life-cycle
KW  - Requirements analysis
KW  - Design representation
ER  -