Norma 6538. Fueloil /  
IRAM 
 - 2a. ed. 
 - Buenos Aires :  IRAM,  1968 
 - 5 p. :    tab. ;    22 cm 
<br/><br/><label>LC Class. No.: </label> / I 58 
<br/><br/><label>Universal Decimal Class. No.: </label>665.75