Clifford, J.F. <br/><br/>
Specifications and tolerances for reference standards and field standard weights and measures: 4. Specifications and tolerances for liquefied petroleum gas and anhydrous ammonia liquid volumetric provers. 

 - [s.l.] :  NIST  1997. 
 - Handbook, no.<105-4> no. 105-4 .
 - National Institute of Standards and Technology^pUS .
 - Handbook, no.<105-4> no. 105-4 .