TY  - BOOK
AU  - Helszajn, J.
TI  - Passive and active microwave circuits
SN  - 0-471-04292-7
U1  - 621.38132 
PY  - 1978///
CY  - New Delhi
PB  - John Wiley
KW  - Filters
KW  - MIcrowave circuit
KW  - Microwave devices
N1  - Includes index
ER  -