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- [S265]  Familienregister Dahn nach 1875, Alfons Helfrich, Gabriele Herold, (Pirmansenser Arbeitsgemeinschaft für Familienforschung, April 2000). 
 
  
- [S24]  1920 US Federal Census, (www.ancestry.com).
 
Name: Mathilder Riedl Home in 1920: Manhattan Assembly District 16, New York, New York Age: 23 years Estimated birth year: abt 1897 Birthplace: Germany Relation to Head of House: Wife Spouse's name: John Father's Birth Place: Germany Mother's Birth Place: Germany Marital Status: Married Race: White Sex: Female Year of Immigration: 1912 Able to read: Yes Able to Write: Yes Image: 324 
 
  
- [S25]  1930 US Federal Census, (www.ancestry.com).
 
Name:  	John Riedel 
Home in 1930: 	River Vale, Bergen, New Jersey 
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Age: 	64 
Estimated birth year: 	abt 1866 
Birthplace: 	New York 
Relation to Head of House: 	Head 
Spouse's name: 	Matilda 
Race: 	White 
 
  
- [S265]  Familienregister Dahn nach 1875, Alfons Helfrich, Gabriele Herold, (Pirmansenser Arbeitsgemeinschaft für Familienforschung, April 2000), 20. 
  
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