TY  - BOOK
T1  - Introduction to telephones and telephone systems
A1  - Noll, A. Michael
LA  - English
PP  - Norwood, Mass.
PB  - Artech House
YR  - 1986
UL  - https://ds.mainlib.upd.edu.ph/Record/UP-99796217602920879
OP  - 177
CN  - TK 6162 N66
SN  - 089006203X
KW  - Telephone.
KW  - Telephone systems.
ER  -