TY  - BOOK
AU  - Knop Joachim
AU  - Mednick S A
AU  - Schulsinger Fini
TI  - Longitudinal research: methods and uses in behavioral science
U1  - 300.72 
PY  - 1981///
CY  - Boston
PB  - Martinus Nijhoff Pub.
KW  - Behavioral science
KW  - Social sciences
ER  -