@inbook {2008,
	title = {Sacrale sporen. De middeleeuwse kerkinrichting},
	booktitle = {De Groninger cultuurschat. De kerken van 1000 tot 1800},
	year = {2008},
	pages = {63-80},
	publisher = {Philips Elchers-Van Gorcum},
	organization = {Philips Elchers-Van Gorcum},
	address = {Groningen-Assen},
	isbn = {978-90-232-4482-0},
	author = {Steensma, Regnerus},
	editor = {Kroesen, J.E.A. and Steensma, Regnerus}
}
@inbook {2008,
	title = {Soberheid in ronde bogen. Tufstenen en vroege bakstenen kerken},
	booktitle = {De Groninger cultuurschat. De kerken van 1000 tot 1800},
	year = {2008},
	pages = {8-17},
	publisher = {Philips Elchers-Van Gorcum},
	organization = {Philips Elchers-Van Gorcum},
	address = {Groningen-Assen},
	isbn = {978-90-232-4482-0},
	author = {Olde, H.G. de},
	editor = {Kroesen, J.E.A. and Steensma, Regnerus}
}
