Johnson, David E. <br/><br/>
Introduction to filter theory 

 -  Prentice-Hall  1976 
 - xii, 306 p. 
 - Prentice-hall electrical engineering series .
<br/><br/> Includes appendix, bibliography and index 
<br/><br/><label>ISBN: </label>0-13-483776-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric filters
<br/><br/><label>Dewey Class. No.: </label>D66e,2 L6J