FamilySearch (https://familysearch.org/pal:/MM9.1.1/QV74-D74V : accessed 17 Nov 2014), Janis B Servais, 1947. » Quellen » Familienstammbaum Servaes, Maastricht/Venlo/Straelen/Neuss/Düsseldorf » Genealogie Online"> FamilySearch (https://familysearch.org/pal:/MM9.1.1/QV74-D74V : accessed 17 Nov 2014), Janis B Servais, 1947. » Quellen » Familienstammbaum Servaes, Maastricht/Venlo/Straelen/Neuss/Düsseldorf » Genealogie Online">