Ander-Egg, Ezequiel <br/><br/>
El desafío ecológico 
[por] Ezequiel Ander-Egg. 
 - Buenos Aires  Hvmanitas  1982. 
 - 150 p.  ill.  24 cm. 
 - Colección guidance .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>8471031531  4.25 
<br/><br/><label>LCCN: </label>80117702  
<br/><br/><label>Nat. Bib. No.: </label>Sp 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Pollution--Environmental aspects.
<br/><br/><label>LC Class. No.: </label>QH541  / .A533 1982