Johnson, David E.,   1946-  <br/><br/>
Introduction to filter theory / 
David E. Johnson. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  c1976. 
 - xii, 306 p. :  ill. ;  24 cm. 
 - Prentice-Hall electrical engineering series .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 283-286. 
<br/><br/><label>ISBN: </label>0134837762 
<br/><br/><label>LCCN: </label>75028442 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric filters
<br/><br/><label>LC Class. No.: </label>TK7872.F5 
<br/><br/><label>Dewey Class. No.: </label>621.3815/32