TY  - BOOK
AU  - Huelsman, L P
AU  - 
TI  - Introduction to the theory and design of active filters
U1  - 621.372.54 
PY  - 1980///
CY  - New York
PB  - McGraw-Hill
KW  - Electronic filters
KW  - Filter design
KW  - Filters
ER  -