@book{48594,
	author = {Van der Merwe, Carel Aron.},
	title = {Die aktualisering van intelligensie by die agterlike kind,},
	publisher = {Universiteit van Pretoria},
	year = {[1971]},
	series = {Opvoedkundige studies,},
	address = {Pretoria,},
	note = {Summary in English.}
}