Ritchie John W <br/><br/>
Biology and human affairs 

 - New York   World book       1948 
 - xvi,818p.  cm. 
<br/><br/><label>Standard No.: </label>70611 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>G, H81