Lancaster, Don. <br/><br/>
Active-filter cookbook /  
by Don Lancaster. 
 - 1st ed. 
 - Indianapolis :    H.W. Sams,    1975. 
 - 240 p. :    ill. ;    22 cm. 
<br/><br/>Includes bibliographical references (p. 234) and index. 
<br/><br/><label>ISBN: </label>0672211688 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Electric filters, Active.
<br/><br/><label>Dewey Class. No.: </label>621.381532