https://www.kwabc.org/en/newsitem/sonja-graf-in-the-wchof-589.html
Sonja Graf in the WCHoF - kwabc.org (en)
We are pleased to hear that the German born female chess master Sonja Graf-Stevenson has been included in the World Chess Hall of Fame - see this page of the...
sonja grafen
https://www.chess.com/blog/introuble2/sonja-graf-the-early-years
Sonja Graf... the early years - Chess.com
This photo was the start for the journey I took into the 1930s archives! It's from a Sonja Graf' s game against Meijlink, played in Utrecht [NED] on 03 Oct...
the early yearssonja grafchess
https://www.cis.iscte-iul.pt/researchteam/sonja-helena-graf
Sonja Helena Graf
sonjahelenagraf