Rolston, Holmes <br/><br/>
Environmental ethics  : duties to and values in the natural world 

 - Philadelphia  : Temple University Press,  1988. 
 - xiii,391p.  : ill.  ; 23cm. 
<br/><br/>Bibliography: p.355-374 
<br/><br/><label>ISBN: </label>087722501X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental ethics
<br/><br/><label>LC Class. No.: </label>GF80.R64