@book{17325,
	author = {Helten, W. L. van},
	title = {Zur lexicologie des altostfriesischen,},
	publisher = {J. Müller,},
	year = {1907.},
	series = {Verhandelingen der Koninklijke akademie van wetenschappen.  Afdeeling letterkunde. nieuwe reeks,},
	address = {Amsterdam,}
}