1.
Notes on the distribution and the shell polymorphism of Cochlicella acuta (Müller) (Gastropoda, Helicidae) in Belgium
2.
3.
4.
5.
6.
7.
Overzicht van de verspreiding en het polymorfisme van Cepaea nemoralis (L.), Cochlicella acuta (Müll.) en Theba pisana (Müll.) (Pulmonata: Helicidae) in de Belgische kustduinen
8.
9.
Survey of the distribution and shell polymorphism of Cochlicella acuta (Müller, 1774) and Theba pisana (Müller, 1774) (Pulmonata, Helicidae) along the Belgian coastal dune area