Terrell, Trevor J. <br/><br/>
Introduction to digital filters / 
Trevor J. Terrell 
 - London  Macmillan  1988 
 - xii, 261p.  ill.  24cm. 
<br/><br/> "A Halsted Press book" 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>ISBN: </label>0333443225  RM21.68 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital filters (Mathematics)<br/>Electric filters, Digital