FamilySearch (https://familysearch.org/pal:/MM9.1.1/QVWW-N2QV : accessed 17 Nov 2014), Ina Elvisa Servais, 1967. » Quellen » Familienstammbaum Servaes, Maastricht/Venlo/Straelen/Neuss/Düsseldorf » Genealogie Online"> FamilySearch (https://familysearch.org/pal:/MM9.1.1/QVWW-N2QV : accessed 17 Nov 2014), Ina Elvisa Servais, 1967. » Quellen » Familienstammbaum Servaes, Maastricht/Venlo/Straelen/Neuss/Düsseldorf » Genealogie Online">