TY  - BOOK
AU  - Lenski, Gerhard
TI  - Human societies: an introduction to macrosociety / 
SN  - 0070371814
AV  - HM 51 .L357 1987
U1  - HS 301  
PY  - 1987///.
CY  - New York
PB  -  McGraw hill, 
KW  -  Sociology
KW  -   Social evolution
ER  -