Smith Rober leo <br/><br/>
Elements of ecology and field biology 

 - New York       Harper          1977 
 - xii,497p.  cm. 
<br/><br/><label>Standard No.: </label>1071 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>Y7:(G:5), L7