Connections :   linking population and the environment /  
edited by Kimberly A. Crews and Patricia Cancellier 
 - Washington :  Population Reference Bureau (PRB),  1991 
 - 2 v. 
<br/><br/> Contiene : v.1 Teacher's guide--v.2 Student resource guide 
<br/><br/>Ecología 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Protección ambiental<br/>Población