TY  - BOOK
AU  - Williams, Arthur B.
AU  - Taylor, Fred J.
TI  - Electronic filter design handbook: IC, Active, and digital filters 
SN  - 00704341
U1  - 621.3815 
PY  - 1988///
CY  - New York
PB  - McGraw- Hill
KW  - Electric filter design
ER  -