TY  - BOOK
AU  - Carl,Helmut
TI  - Radio relay systems / 
U1  - 621.38415 CAR 
PY  - 1966///
CY  - London : 
PB  - Macdonald & Co. , 
KW  - Radio relay systems
N1  -  Translation of Richtfunkverbindungen;  Includes bibliographical references
ER  -