Universal Decimal Classification :  UDC 621.1: Generation, distribution and use of steam, steam engines, boilers 

 - 4. ed 
 - 18 p. 
 - FID Publication ; n.179)British Standards ; 1000621.1): April 1973 .
<br/><br/><label>ISBN: </label>0-580-07804-3 
<br/><br/><label>Subjects--Corporate Names: </label><br/>International Federation for Information and Documentation
<br/><br/><label>Subjects--Topical Terms: </label><br/>maquinaria<br/>Vapores
<br/><br/><label>Universal Decimal Class. No.: </label>025.45CDU  / F449u