TY  - BOOK
AU  - Lenski,Gerhard
AU  - Lenski,Jean
TI  - Human societies: an introduction to macrosociology 
SN  - 0070371741 :
AV  - HM585 LEN 
PY  - 1978///
PB  - McGraw-Hill
KW  - Macrosociology
KW  - Social evolution
N1  - Includes bibliographical references and indexes
ER  -