TY  - BOOK
AU  -  Lancaster,Don
TI  -  Active-filter cookbook / 
SN  -  0672211688
U1  -  621.381532 
PY  - 1975///
CY  -  Indianapolis : 
PB  -  H.W. Sams, 
KW  -  Electric filters, Active
N1  -  Includes bibliographical references (p. 234) and index
ER  -