TY  - BOOK
AU  - Helszajn,J.
TI  - Passive and active microwave circuits
SN  - 0471042927
U1  - 621.381/32 
PY  - 1978///
CY  - New York
PB  - Wiley
KW  - Microwave circuits
KW  - Microwave devices
ER  -