TY  - BOOK
AU  - ATKINSON, J
TI  - TELEPHONY , V-II: AUTOMATIC EXCHANGE SYSTEMS
U1  - D66,48 
PY  - 1950///
CY  - LONDON
PB  - SIR ISAAC PITMAN & SONS, LTD
KW  -  TELEPHONY
KW  - ELECTRICAL ENGINEERING
ER  -