@book{33114,
	author = {Perquin, Nic.,},
	title = {Pedagogische psychologie van de middelbare scholier /},
	publisher = {J.J. Romen & Zonen,},
	year = {1968.},
	address = {Roermond :},
	edition = {2e, herz. dr.},
	note = {Titel op omslag en rug: Pedagogische psychologie.}
}