FamilySearch (https://familysearch.org/pal:/MM9.1.1/NZ6S-SB9 : accessed 06 Nov 2014), Wilhelmi Servaas in entry for Fredericus Wilhelmus Servaas, 17 Nov 1837; citing ; FHL microfilm 890630. » Quellen » Familienstammbaum Servaes, Maastricht/Venlo/Straelen/Neuss/Düsseldorf » Genealogie Online"> FamilySearch (https://familysearch.org/pal:/MM9.1.1/NZ6S-SB9 : accessed 06 Nov 2014), Wilhelmi Servaas in entry for Fredericus Wilhelmus Servaas, 17 Nov 1837; citing ; FHL microfilm 890630. » Quellen » Familienstammbaum Servaes, Maastricht/Venlo/Straelen/Neuss/Düsseldorf » Genealogie Online">