John M. Clarke,  <br/><br/>
Education Department Bulletin No;482  November 1, 1910 

 - New York   University State  1910 
 - 119p. : ill ,  map :  21 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science 
<br/><br/><label>Universal Decimal Class. No.: </label>3a  / B6