TY  - BOOK
AU  - Bernardi, Bernardo .
TI  -  Age class systems : : social institutions and polities based on age 
SN  - 0521314828
U1  - 301.435 
PY  - 1985///
CY  -  New York
PB  - Cambridge University Press
KW  - Age groups.
N1  - Includes bibliography
ER  -