TY  - GEN
AU  - Smith,Sydney F.
TI  - Telephony and telegraphy: an introduction to instruments and switching systems (electromechanical and reed-electronic) 
SN  - 0198593589 :
U1  - 621.385,SMI 
PY  - 1978///
CY  - Oxford, New York
PB  - Oxford University Press
KW  - Telegraph
KW  - Telephone
N1  - Telephone and Teleprinters (Page-1), Relays (Page-29), Signaling (Page-58), Switching Systems (Page-80), Strower Systems-Selector Mechanism (Page-115), Strower System-Selector Circuits (Page-140), Traffic and Trunking (Page-173), Distribution Farms (Page-205), Exchange Power Plant (Page-221)
ER  -