Lancaster, Donald E. <br/><br/>
Active-filter cookbook / 
Donald E Lancaster 
 - Indianapolis :  H.W. Sams ,  1975. repr. 1981. 
 - 240p. :  ill. ;  22 cm. 
<br/><br/>Includes Bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric filters, Active
<br/><br/><label>Dewey Class. No.: </label>621.381532 LAN