Spencer, Herbert <br/><br/>
the Factors of Organic  

 - New York  D. Appleton And Company  2017 
 - 76 
<br/><br/><label>ISBN: </label>9781330429068 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Evolution
<br/><br/><label>Dewey Class. No.: </label>576 SPE