@book{143840,
	author = {Magnusson, David. and European Network on Longitudinal Studies on Individual Development.},
	title = {Problems and methods in longitudinal research :},
	publisher = {Cambridge University Press,},
	year = {1991.},
	series = {European Network on Longitudinal Studies on Individual Development ;},
	address = {Cambridge ;},
	note = {Texts emanate from workshops organized by the European Network on Longitudinal Studies on Individual Development.}
}