Williams, Arthur B,  1940- <br/><br/>
Electronic filter design handbook / 
Arthur B. Williams, Fred Taylor. 
 - 4th ed. 
 - New York :  McGraw-Hill,  2006. 
 - xv, 775p :  ill. ;  24 cm + 1 D-ROM ( 4 3/4 in.) 
<br/><br/>Includes bibliographical references and index. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0071471715 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric filters--Design and construction.