@inbook {1998,
	title = {The Beginnings of the Military Orders in Frisia},
	booktitle = {Welfare and warfare},
	series = {The military orders},
	volume = {2},
	year = {1998},
	pages = {307-317},
	publisher = {Ashgate},
	organization = {Ashgate},
	address = {Aldershot},
	isbn = {978-0-86078-679-5},
	issn = {0-86078-679-X},
	author = {Mol, J.A.(Hans)},
	editor = {Nicholson, Helen J.}
}
