@book{44629,
	author = {De Roos, Siebe Paulus },
	title = {De Ethiek van de ongehuwde staat.},
	publisher = {GF Callenbach},
	year = {1964.},
	series = {[Ethische verkenningen.]},
	address = {Nijkerk},
	edition = {2de Druk}
}