TY  - BOOK
TI  - Cohart Analysis Quantitative applications in the social sciences
SN  - 080390794x 
AV  - HB 849.47 .G584 1997  
PY  - 1977///.
CY  - London : 
PB  - Sage publications Inc., 
KW  - _ Research methods
N1  - includes references; includes references
ER  -