| Sources |
- [S451] DESCENDANTS OF JOHANN LANG, Schaefer, Helen, (1993 and 1997, Helen Schaefer, Dallas, Texas, 1993 copy obtained from Alton Buehring, Odem, Texas), pp. 4, 94 [Schaefer pp. 41-47, 92-95], 25 Sep 1993.
- [S553] Family Information from Helen Schaefer, Helen Schaefer, Dallas, Texas, (Family Group Sheet), [Schaefer p. 110], 26 Oct 1997.
- [S451] DESCENDANTS OF JOHANN LANG, Schaefer, Helen, (1993 and 1997, Helen Schaefer, Dallas, Texas, 1993 copy obtained from Alton Buehring, Odem, Texas), p. 4 [Schaefer pp. 41-47, 92-95], 25 Sep 1993.
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