FamilySearch (https://familysearch.org/pal:/MM9.1.1/NXYH-7VK : accessed 04 Nov 2014), Johann Joseph Servaes in entry for Catharina Servaes, ; citing DUESSELDORF STADT,RHEINLAND,PRUSSIA; FHL microfilm 939761. » Quellen » Familienstammbaum Servaes, Maastricht/Venlo/Straelen/Neuss/Düsseldorf » Genealogie Online"> FamilySearch (https://familysearch.org/pal:/MM9.1.1/NXYH-7VK : accessed 04 Nov 2014), Johann Joseph Servaes in entry for Catharina Servaes, ; citing DUESSELDORF STADT,RHEINLAND,PRUSSIA; FHL microfilm 939761. » Quellen » Familienstammbaum Servaes, Maastricht/Venlo/Straelen/Neuss/Düsseldorf » Genealogie Online">