Waldén, H.W. (1983). Systematic and biogeographical studies of the terrestrial Gastropoda of Madeira. With an annotated check-list. Annales Zoologici Fennici. 20: 255-275. Helsinki.
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Waldén, H.W.
1983
Systematic and biogeographical studies of the terrestrial Gastropoda of Madeira. With an annotated check-list