Headland, Thomas Neil <br/><br/>
Why foragers do not become farmers  a historical study of a changing ecosystem and its effect on a Negrito hunter-gathered group in the Philippines 
by Thomas Neil Headland 
 - Honolulu, Hawaii  University of Hawaii  1986 
 - xxxii, 703 p. : ill. ; 21 cm. 
<br/><br/>Thesis (Ph.D) - University of Hawaii, 1986 
<br/><br/>p. 655-703 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social change<br/>Social history
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Philippines--Social conditions