Hilburn, J.L. Johnson, D.E. <br/><br/>
Rapid practical designs of active filters 

 - New York  John Wiley & Sons  1975 
 - ix,264p.  22cm. 
<br/><br/><label>ISBN: </label>0471443042 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Filters<br/>Electric filters-designs
<br/><br/><label>Dewey Class. No.: </label>621.381532  / J51R