@book{19469,
	author = {Van Rooy, D. J.},
	title = {Analitiese meetkunde /},
	publisher = {Pro Rege,},
	year = {1956.},
	address = {Potchefstroom :},
	edition = {2de dr.},
	note = {Acc. No. D870753 is Helmut Weigert collection.}
}