TY  - BOOK
AU  - Schulsinger, Fini
AU  - Knop, Joachim
TI  - LONGITUDINAL RESEARCH
U1  - 300.72 
PY  - 1981///
CY  - Boston
PB  - Martinus Nijhoff Pub.
KW  - Psychological Research -- Longitudinal Studies
KW  - Social Sciences -- Longitudinal Studies
KW  - Longitudinal Method
ER  -