TY  - BOOK
AU  - Darr,Jack
TI  - How to install & service intercommunication systems
T2  - A Rider publication,
U1  - 621.3853 
PY  - 1957/// [reprinted 1957]
CY  - New York
PB  - J. F. Rider
KW  - Intercommunication systems
N1  - Includes index
ER  -