Williams, Leonard . <br/><br/>
Challenge to Survival: A Philosophy of Evolution /  Textual Documents 
Leonard Williams. 
 - 1st ed. / 
 - London :  Andre Deutsch ,  C1971. 
 - 316p. :  ill ;  22cm . 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Biology Biology-Evolution G-Biology 
<br/><br/><label>Dewey Class. No.: </label>574  / W 678 C