TY  - BOOK
AU  - Friedman J
AU  - Rowlands M J
TI  - Evolution of social systems
SN  - 0-7156-0934-3
U1  - 303.4 
PY  - 1977///
CY  - London
PB  - Duckworth
KW  - Social change
KW  - Social evolution
KW  - Social system
N1  - Proceedings of the 5th meeting of the research seminar held atInst.of Archaeology,London University
ER  -