No.	Title	Date
1	Geology and Paleontology of Bonaire (D.W.I.)
2	Growth and Occurrence of the Reef Coral Porites Astreoides Lamarck in Relation to Submarine Radiance Distribution
3	Cladistic analysis of the Polycystididae (Platyhelminthes Kalyptorrhynchia), with application of phylogenetic nomenclature
4	Feeding ecology of coral reef sponges