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Are you Hans Vermaak, author of the books below?
Plezier beleven aan taaie vraagstukken by Hans Vermaak Iedereen verandert by Hans Vermaak De logica van de lappendeken by Hans Vermaak Leren veranderen by Léon de Caluwé Veranderen van maatschappelijke organisaties by Jaap Boonstra


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