Zdenka Marie Dvorak Spinka was born in Iowa on October 27, 1892. "Sadie" was the wife of Matthew Spinka.
She was in Dayton, Ohio in 1920; Chicago in 1930-40 and later moved to Pomona, CA. She died there on May 23, 1983.
Source: Edan Hughes, "Artists in California, 1786-1940"
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