Holt, Sidney J. <br/><br/>
New principles for the conservation of wild living resources / 
by Sidney J. Hold and Lee M. Talbot. 
 -  1978. 
 - 33 p. :  il. ;  26 cm. 
<br/><br/><br/>Inglés 
<br/><br/><label>Subjects--Index Terms: </label>Conservación. 
<br/><br/><label>Dewey Class. No.: </label>333.72