Penfold, R. A. <br/><br/>
More advanced power supply projects /  [Book]. 
R. A. Penfold. 
 - London :   Bernard Babani (publishing) Ltd,   1988 
 - 92p. :   ill. ;   18cm 
<br/><br/><label>ISBN: </label>0859341666 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic apparatus and appliances--Power supply.<br/>Electronics--Amateurs' manuals.