"The publisher of the book removed the names of persons in the novel because these persons really existed and could be harmed by the publication of this material. This was probably done under pressure as these persons were very influential. This action was taken without the authors permission and occurred in the first two editions."
Source: "Het Spel Ende Knikkers", Piet Calis et al, Menlenhoff Educatief, Amsterdam, 1975.