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Samples in periodicals archive:
Opzet en uitvoering van het WIL-panel 1 en 2 [Design and data-collection of The Utrecht Study of Adolescent Development I and 2].
Data for this study were collected as part of the larger Utrecht Study of Adolescent Development (USAD; Meeus & 't Hart, 1993).
The data for this study were gathered from three questionnaires used in the Utrecht Study of Adolescent Development, a longitudinal project.