Paul C.H. Albers (1965) PhD. Managing Editor of Behaviour. Guest-researcher at Naturalis, the National Museum of Natural History in Leiden, the Netherlands on the Dubois collection and on triassic fossils from the Winterswijk quarries.
John de Vos (1947) Permanent researcher at Naturalis, the National Museum of Natural History in Leiden, the Netherlands, specializing on taxonomic, systematic, geographic, stratigraphic research of the Pleistocene mammals of the Netherlands and Southeast Asia, in relation to fossil man.