Andersen, R.J. <br/><br/>
Specifications and tolerances for reference standards and field standard weights and measures: 5. Specifications and tolerances for field standard stopwatches. 

 - [s.l.] :  NIST  1997. 
 - Handbook, no.<105-5> no. 105-5 .
 - National Institute of Standards and Technology^pUS .
 - Handbook, no.<105-5> no. 105-5 .