| Quellen |
- [S90] FamilySearch, (Kirche Jesu Christi der Heiligen der Letzten Tage).
"New York, Kings County Estate Files, 1866-1923," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:S3G9-DJ5S-98?cc=1466356&wc=MPCQ-LL8%3A44954901%2C126828301%2C126885401 : 21 May 2014), Kings County > Lu > Ludwig, Philipp (1897) > image 3 of 13; Surrogate Court, Brooklyn.
- [S90] FamilySearch, (Kirche Jesu Christi der Heiligen der Letzten Tage).
"New York, New York City Municipal Deaths, 1795-1949", database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:2WGG-XXT : 13 May 2022), Philip Ludwig in entry for Louis Ludwig, 1947.
- [S90] FamilySearch, (Kirche Jesu Christi der Heiligen der Letzten Tage).
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:S3HY-6G23-1HX?cc=1438024&wc=K5HP-MNL%3A518819101%2C518819102%2C519866601 : 13 June 2019), New York > New York > New York City, ward 17 > image 4272 of 4960; citing NARA microfilm publication M593 (Washington, D.C.: National Archives and Records Administration, n.d.).
- [S90] FamilySearch, (Kirche Jesu Christi der Heiligen der Letzten Tage).
"New York State Census, 1892," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:S3HT-DYMS-3MR?cc=1529100&wc=3FGD-J47%3A69522401%2C69910001 : 22 May 2015), Kings > Brooklyn, Ward 18, E.D. 11 > image 9 of 13; county offices, New York.
- [S90] FamilySearch, (Kirche Jesu Christi der Heiligen der Letzten Tage).
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:33S7-9YB8-KKV?cc=1417683&wc=XHDL-DP8%3A1589409304%2C1589410467%2C1589396194%2C1589394789 : 24 December 2015), New York > Kings > Brooklyn > ED 174 > image 25 of 72; citing NARA microfilm publication T9, (National Archives and Records Administration, Washington, D.C., n.d.)
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