TY  - BOOK
AU  - Schulsinger, Fini, Mednick. Sarnoff A. and Knop, Joachim
TI  - Longitudinal research: : methods and uses in behavioral science
SN  - 0898380561
U1  - 001.42 
PY  - 1981///
CY  - London
PB  - ; Martinus Nijhoff Publishing
KW  - Longitudinal Research
KW  - Research
KW  - Research Methodology
ER  -