TY  - BOOK
AU  - Harbottle,H.R., x
AU  - Hanman,B.L.
TI  - The principles of telecommunications engineering: x
SN  - x
U1  - 621.38/HAP 
PY  - 1962///
CY  - Lond.
PB  - English Univ. Press
KW  - Communications
N1  - x
ER  -