TY  - BOOK
AU  - Lenski,Gerhard Emmanuel
TI  - Human Societies: a macrolevel introduction to sociology 
U1  - 301 22
PY  - 1970///
CY  - New York
PB  - McGraw-Hill
KW  - Sociology
KW  - Social evolution
N1  - Includes bibliographical references and index
ER  -