@inbook {1989, title = {Der Patrozinienkult des Hl. Willibrord in den Niederlanden}, booktitle = {Willibrord: Apostel der Niederlande, Gr{\"u}nder der Abtei Echternach: Gedenkgabe zum 1250. Todestag des angels{\"a}chsischen Missionars}, year = {1989}, pages = {173-185}, publisher = {Imprimerie Saint-Paul}, organization = {Imprimerie Saint-Paul}, address = {Luxembourg}, issn = {2-87963-079-7}, author = {Kiesel, Georges}, editor = {Kiesel, Georges and Schroeder, Jean} }