TY  - BOOK
AU  - Bhattacharya D K
TI  - Ecology and social formation in acient history
U1  - Y7:10gG:5, N0 
PY  - 1990///
CY  - Calcutta
PB  - K P Bagchi     
KW  - SOCIOLOGY
N1  - Bibliography99-102p
ER  -