The prosobranch molluscs of Britain and Denmark: Part 9 - Pyramidellacea
Fretter, V.; Graham, A. (1986). The prosobranch molluscs of Britain and Denmark: Part 9 - Pyramidellacea. J. Molluscan Stud. Suppl. 16: 557-649
In: Journal of Molluscan Studies. Supplement. Oxford University Press: Oxford. ISSN 0263-5666, more
Continues:Fretter, V.; Graham, A. (1984). The Prosobranch Molluscs of Britain and Denmark: Part 8 - Neogastropoda. J. Molluscan Stud. Suppl. 15: 435-556, more
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