Williams, Emrys. <br/><br/>
Electric filter circuits :  an introductory course / 
Emrys Williams. 
 - London :   Isaac Pitman,  c 1963. 
 - viii, 163 p. :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/>318  318 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric, electronic, magnetic, communications, computer engineering; lighting.
<br/><br/><label>Dewey Class. No.: </label>290.1 / K527p