& Meer, Puzzelboeken (3) & Meer, Puzzelwoordenboek (2) Langstraat, Tjeerd (2) Alberda, Alexandra P. (the University Of Manchester), Chipangura, Njabulo (maynooth University), Choksey, Lara (university College London), Groot, Jerome De (the University Of Manchester) (2) Puzzelboeken, Sudoku (1)