TY  - BOOK
AU  - Mwita,A.
TI  - Layout of PBX system for ECSE
AV  - ECSE PRO TK6397.M854 
PY  - 2003///
CY  - Dar es Salaam
PB  - University of Dar es Salaam
KW  - Telecommunication systems
KW  - Private Branch Exchanges
N1  - Includes bibliographical references
ER  -