TY  - BOOK
AU  - Hauser, Robert M  .
TI  - Process of stratification: trends and analyses / 
SN  - 0-12-333050-5
U1  - Y:58(H31).73 
PY  - 1977///
CY  - London : 
PB  - Academic Press , 
KW  - Social mobility-United States
ER  -