A 2001 posting was trying to find the reference for the family tree of Gregor Mendel published by Alois Schinder. It was published as follows:
Alois Schindler: "4. Ahnentafel: Prälat Gregor Johann Mendel, Naturforscher, Entdecker der Vererbungsgesetze. " Sudetendeutsche Familienforschung 2, Aussig/Elbe 1929/1930, H. 2, S. 76-80.
If you have having trouble finding these articles, please contact me.