TY  - GEN
AU  - Helszajn, J.
TI  - Microwave planar passive circuits and filters
SN  - 0471940569
PY  - 1994///
CY  - Chichester
PB  - John Wiley
KW  - MICROWAVE CIRCUITS
KW  - Microwave filters
KW  - Electric filters,Passive
ER  -