Universal decimal classification:   Complete English edition fourth international edition  
/ British standards institution 
 - 2nd ed.  
 - London:   British standards institution,  
 - 67p.  
<br/><br/> 621.3 electrical engineering  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Library science 
<br/><br/><label>Subjects--Index Terms: </label>Classification scheme  
<br/><br/><label>Universal Decimal Class. No.: </label>D 025.45:621.3  / K4;1