TY  - BOOK
AU  - Ellen Roy
TI  - Environment, subsistence and system:  The ecology of small -scale social formations   
T2  - Themes in the Social Sciences
SN  - 0521287030
U1  - U:(G:55), M2 
PY  - 1982///
CY  - Cambridge
PB  - Cambridge University Press        
KW  - Geography- Environment
N1  - Bibliography: P 287-312
ER  -