@book {1998,
	title = {Die Abteikirche von Klosterrath. Baugeschichte und Bedeutung (De Abdijkerk te Rolduc. Bouwgeschiedenis en betekenis)},
	series = {Clavis Kunsthistorische Monografie{\"e}n},
	volume = {18},
	year = {1998},
	pages = {224},
	publisher = {Clavis Stichting Publicaties Middeleeuwse Kunst},
	organization = {Clavis Stichting Publicaties Middeleeuwse Kunst},
	address = {Utrecht},
	issn = {90-75616-06-6},
	author = {Hardering, Klaus C.}
}
