Adaptive strategies and change in Philippine swidden-based societies / 
edited by Harold Olofson. 
 - College, Laguna, Philippines :  Forest Research Institute,  c1981. 
 - viii, 181 p. :  ill., maps ;  26 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Shifting cultivation--Philippines.<br/>Agriculture--Philippines.