TY  - BOOK
AU  - Johnson, D E
AU  - 
TI  - Handbook of active filters
U1  - 621.372.54(02) 
PY  - 1980///
CY  - New Jersey
PB  - Prentice-Hall of India
KW  - Electronic filters
KW  - active filters
KW  - Filters
KW  - Johnson, J R
KW  - Moore, H P
ER  -