@book{17725,
	author = {Waterink, Jan.},
	title = {Principe en gezag in de hedendaagse psychologie en paedagogiek /},
	publisher = {[s.n.],},
	year = {[ca. 1962]},
	address = {[S.l.] :},
	note = {Afscheidscollege Amsterdam V.U. 1962.}
}