TY  - BOOK
AU  - Chen,Wai-kai
TI  - Passive and active filters: theory and implementions 
SN  - 047182352X
PY  - 1986///
CY  - New York
PB  - John Wiley & Sons
KW  - Electric filters, Active
KW  - Electric filters, Passive
KW  - Analog electronic systems
ER  -