TY  - BOOK
AU  - Helszajn, J
TI  - Microwave planar passive circuts and filters
SN  - 0-471-94056-9
U1  - 621.38132 HEL'M 
PY  - 1994///
CY  - NEWYORK
PB  - JOHN WILEY
KW  - MICROWAVE CIRCUITS MICROWAVE FILTERS ELECTRIC FILTERS, PASSIVE
ER  -