@book{10389,
	author = {Sperna Weiland, Jan.},
	title = {Voortgezette ori�entatie :},
	publisher = {Het Wereldvenster,},
	year = {c1971.},
	address = {Baarn :},
	edition = {Derde ongewijzigde druk.},
	note = {Includes index.}
}