TY  - BOOK
AU  - Ruspini,Elissabetta
TI  - Introduction to longitudinal research
T2  - Social research today
SN  - 0415260078
PY  - 2002///
CY  - New York
PB  - Routledge
KW  - Social sciences
KW  - Research
KW  - Methodology
KW  - Longitudinal studies
N1  - Includes bibiliographical references and index
ER  -