TY  - BOOK
AU  - Friedman,J..
AU  - Rowlands,M.J..
ED  -                                                                                                                                                                                                                                                                . 
TI  - The evolution of social systems / 
SN  - 0715609343
U1  - 303.4 
PY  - 1982///
CY  - Gloueester : 
PB  - Duckworth , 
KW  - SOCIAL EVOLUTION
N1  - Includes index
ER  -