Heyboer A. A woman, watercolour on paper 39,7 x 30,4 cm, signed l.m.> more information
Heyboer A. Ollekebolleke, oil on canvas 54,9 x 64,9 cm, signed twice l.c. and c.r. and dated 1977> more information
Heyboer A. Untitled, oil on canvas 150 x 199,2 cm, signed u.c. and l.r. and dated 1975 and 1977> more information