Hansell, Grant E.  <br/><br/>
Filter Design and Evaluation  
Grant E. Hansell 
 - Canada:  Van Nostrand Reinhold Company,   1969. 
 - 203p. 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>621.381  / HAN/F