World weights and measures   Hand book for statisticians.    

 - New York  United Nations          1966 
 - vi;138p  cm. 
 - Statistical papers series no.21 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>V1N45,93:3(B2897).4.N66s, K6/UN