TY  - BOOK
AU  - Mason,William M.
AU  - Fienberg,Stephen E.
TI  - Cohort analysis in social research: beyond the identification problem 
SN  - 0387960538
U1  - 300/.72�19 
PY  - 1985///
CY  - New York
PB  - Springer-Verlag
KW  - Cohort analysis
ER  -