TY  - BOOK
A1  - Singer, J.D.
A1  - Willett, J.B.
T1  - Applied longitudinal data analysis. Modeling change and event occurrence
Y1  - 2003
DO  - 10.1093/acprof:oso/9780195152968.001.0001
CY  - Oxford
PB  - University Press

ER  -