Waters, Allan. <br/><br/>
Active filter design /  [Books]. 
Allan Waters.  
 - London :   MacMillan,   1991. 
 - xii, 161p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0333488628 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric filters--Design and construction.