Terrell, Trevor J. <br/><br/>
Introduction to digital filters /  [Books]. 
Trevor J. Terrell.  
 - London :   Macmillan,   1980. 
 - x,222p. :   ill. ;   25cm. 
<br/><br/> With answers.  Includes index. 
<br/><br/><label>ISBN: </label>0333246705 0333246713 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Digital filters (Mathematics)