Population growth, poverty, and environmental stress :  frontier m igration in the Philippines and Costa Rica / 
Maria Concep cion Cruz ... [et al.]. 
 - Washington, D.C :  World Resources Institute,   c1992. 
 - viii, 92 p. :  ill. ;   26 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0915825864 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Migration, Internal--Philippines.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Philippines-- Population.<br/>Costa Rica-- Population.
<br/><br/><label>Dewey Class. No.: </label>304.6009599