@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} }