@book{47790,
	author = {Van der Berg, Willem Petrus.},
	title = {Tema en variasies /},
	publisher = {Nasionale pers, Beperk,},
	year = {1947.},
	series = {Ons eie biblioteekskema, jaargang 2, no. 6},
	address = {Kaapstad, Bloemfontein en Port Elizabeth :}
}