ISA handbook of control valves 

 - 2nd ed 
 - Pennsylvania :   Instrument Society of America,   1976. 
 - 533 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>VALVULAS<br/>CONTROL DE VALVULAS
<br/><br/><label>Universal Decimal Class. No.: </label>621.646