https://www.olimpbase.org/ind-benelux/ned-1981.html
OlimpBase :: 37th Dutch Chess Championship, Leeuwarden 1981
OlimpBase: the encyclopaedia of team chess
dutch chess championshipleeuwarden
https://www.olimpbase.org/ind-benelux/ned-1963.html
OlimpBase :: 22nd Dutch Chess Championship, The Hague 1963
OlimpBase: the encyclopaedia of team chess
dutch chess championshipthe hague