@book{35972,
	author = {Schnell, D. S. A. and Ahlers, H. J.},
	title = {Rekenkunde met insig :},
	publisher = {Voortrekkerpers,},
	year = {[1968]},
	address = {Johannesburg :},
	note = {Also available in English under title: Arithmetic with insight : standard 7.}
}