@book{16309,
	author = {Stoker, D. J.},
	title = {Steekproefneming in die praktyk /},
	publisher = {Universiteit van Pretoria,},
	year = {1981.},
	series = {Publikasies van die Universiteit van Pretoria, Nuwe reeks ;},
	address = {(Pretoria) :},
	note = {Lesing gelewer as professor honorer op 18 September 1981.}
}