TY  - SER
ED  - England.
TI  - G.E.C.telecommunications
PY  - 1951///-1958
CY  - England
PB  - G.EC.telecommunications
N1  - Vol.1 :No.1,2,15,16,17,18,19,20; Vol.2 : No.21,22,23,24,25,26
ER  -