Watson, E.I. Grant. <br/><br/>
Man and his universe / 
Watson, E.I. Grant. 
 - London  The scientific book club  1942 
 - 192 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology
<br/><br/><label>Dewey Class. No.: </label>577  / WAT