Sumner W L <br/><br/>
Progress in science 
Sumner W L 
 -  1946 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>60598 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science essays
<br/><br/><label>Dewey Class. No.: </label>Az7, H6