TY  - BOOK
AU  - Lenski,Gerhard
AU  - Lenski,Jean
TI  - Human societies: an introduction to macrosociology 
SN  - 0070371741
U1  - 301 
PY  - 1978///
CY  - New York
PB  - McGraw-Hill
KW  - Macrosociology
KW  - Social evolution
N1  - Includes bibliographical references and indexes
ER  -