Rolston, Holmes, III..
Environmental ethics : duties to and values in the natural world /

. - Philadelphia  : Temple University Press,  1988 
. - xiii, 391 p. : ill.  23 cm. 
 - ((Ethics and action) )
<br/>К.: Бібліогр. : с. 373-374. 
<br/><label>  ISBN: </label>0-87722-501-X