TY  - BOOK
AU  - Schaumann Rolf
AU  -  Valkenburg Mac E. Van
AU  -  Xiao Haiqiao
TI  - Analog filter design
U1  - D651,1478, Q1 
PY  - 2011///
CY  - New York  
PB  -  Oxford University Press       
KW  - Electronic Science
ER  -