TY  - BOOK
AU  - Hills, M.T
TI  - Telecommunications Switching Principles
SN  - 46210261
U1  - 621.387 HIL 
PY  - 1979///
CY  - London
PB  - George Allen & Unwin
KW  - Telecommunication Engineering
KW  - Technology
N1  - Includes Index
ER  -