@book{41402,
	author = {Groenman-Deinum, A. J. and Groenman-Deinum, A.J. and Wolfensberger, J.R.},
	title = {De zin van de zondag /},
	publisher = {Kok,},
	year = {1963.},
	series = {Nederlands gesprekcentrum publicatie, no. 18},
	address = {Kampen :}
}