Hunter,Richard    <br/><br/>
Alternating current :   what it is and where it's used /  
Richard Hunter-english    
 - Crowborough :  Audio Visual Source,   [19__]    
 - Videocassette :  22:10min;   19cm.    
 - Bergwall production    .
<br/><br/> VHS/NTSC    
<br/><br/><label>ISBN: </label>20040000342    
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric currents,alternating