@book{17478,
	author = {Parreren, C.F. van},
	title = {Leren op school /},
	publisher = {Wolters-Noordhoff,},
	year = {cop. 1990.},
	address = {Groningen :},
	edition = {12e herz. dr.},
	note = {1e dr.: 1965.}
}