@book{16906,
	author = {Van Rooy, D. J.},
	title = {Die beginsels van die onderwys van algebra en rekenkunde /},
	publisher = {NASOU,},
	year = {1966.},
	series = {Nasionale raad vir sosiale navorsing. Publikasiereeks no. 15},
	address = {(Kaapstad) :}
}