Terrell, Trevor J. <br/><br/>
Introduction to digital filters / 
Trevor J. Terrell. 
 - London :  MacMillan,  1980. 
 - 222 p. :  ill. ;  25 cm. 
<br/><br/> 'A Halsted Press book' 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0333246713 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric filters, Digital.<br/>Digital filters (Mathematics).