Ellen, R. F.,  1947- <br/><br/>
Environment, subsistence, and system :  the ecology of small-scale social formations / 
Roy Ellen. 
 - Cambridge [Cambridgeshire] ;  New York :  Cambridge University Press,  1982. 
 - xvi, 324 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0521244587 0521287030 (pbk.) 
<br/><br/><label>Dewey Class. No.: </label>304.2