Universal decimal classification. UDC 65/651, 657/659 :   industrial and business management and organization. communication 

 - 4th ed. 
 - London :   British Standards Institution,   1968. 
 - 39 páginas 
 - FID. Publicaçao ; no. 179 .
<br/><br/><label>Subjects--Index Terms: </label>Cdu Clasificacion Decimal Universal