TY  - BOOK
AU  - Chen,Wai-Kai
TI  - Passive and active filters: theory and implementations 
PY  - 1986///
CY  - New York
PB  - John Wiley & Sons
KW  - LEMB
UR  - http://s1.downloadmienphi.net/file/downloadfile6/192/1385081.pdf
ER  -