System of Units: National and International Aspects 

 - Maryland:  America Association for the Advancement of science,  1959. 
 - x,297p.;  23cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>D.A. Perera Collection<br/>Systems
<br/><br/><label>Dewey Class. No.: </label>500  / SYS