TY  - BOOK
AU  - Joel, Amos E
TI  - Electronic switching: central office systems of the world 
SN  - 0879420790
AV  - TK 6397 Ele 
PY  - 1976///
CY  - New York
PB  - The Institute of Electrical and Electron
KW  - Telephone switching systems, Electronic
KW  - Telephone stations
ER  -