Fritz E. Froehlich; Allen Kent <br/><br/>
The Froehlich/Kent Encyclopedia of Telecommunications  Volume 7 - Electrical Filters: Fundamentals and System Applications to Federal Communications Commission of the United States 

 -  Taylor and Francis  1993 
<br/><br/><label>ISBN: </label>9781003209874 
<br/><br/><label>Source: </label>EBOOK