TY  - BOOK
AU  - Palmer, R.W.
TI  - Relays in automatic telephony
U1  - 621.385 
PY  - 1930///
CY  - London
PB  - Isaac Pitman and Sons
KW  - Automatic telephony
KW  - Relay logic
KW  - Signal path control
N1  - Includes bibliographical references and index
ER  -