Modern crystal and mechanical filters / 
edited by Desmond F. Sheahan, Robert A. Johnson. 
 - New York :  IEEE Press,  c1977. 
 - vii, 455 p. : ill. 
 - IEEE Press books .
<br/><br/><label>ISBN: </label>0471032379 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric filters, Crystal.<br/>Mechanical filters (Electrical engineering).<br/>Electric circuits.