TY  - SER
ED  - United States of América.
TI  - Telephony
PY  - 1981///
CY  - Chicago 3
PB  - Telephony publishing Corp
N1  - V.200 No.4; V.200 No.8; V.200 No.12; V.200 No.17; V.200 No.21; V.200 No.26; V.201 No.4; V.201 No.8; V.201 No.13; V.201 No.22; V.201 No.26
ER  -