No.	Title	Date
1	Studies on the fauna of Curaçao, Aruba, Bonaire and the Venezuelan Islands
2	Beschermde en te beschermen vogels van de Benedenwindse Eilanden : Protected and beneficial birds of the Leeward Islands
3	Zee en strand : biologie van de Nederlandse Antillen
4	Shells and shelling : hundreds of shells in color
5	Birds of Bonaire