Anton Heyboer : signalen en symbolen = Signs and symbols = Signaux et symboles / [text by Mark Slegers ; forew. by Anton Heyboer ; photographs: Ben Drouen ; transl. in English by: J.E. van Schaik ; transl. in French by: Trait d'Union]De Kooning : Willem de Kooning, works on paper : 1954-1984 / [text by: Annelette Hamming ; photographs: Ben Drouen ; transl. by: J.E. van Schaik]