Johnson, David E. <br/><br/>
Introduction to filter theory / 
David E. Johnson. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1976. 
 - xii, 306 p. :  ill. ;  24 cm. 
 - Prentice-Hall electrical engineering series .
<br/><br/>Bibliography: p. 283-286 
<br/><br/><label>ISBN: </label>0134837762 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric filters.