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Worldwide Door Snails (Clausiliidae),
recent and fossil
by Hartmut Nordsieck
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News on Chinese Door Snails
by Hartmut Nordsieck
Acta Conchyliorum, 12
_____________
Pulmonata, Stylommatophora, Helicoidea:
Systematics with Comments
by Hartmut Nordsieck
ConchBooks
C. Renker
www.conchbooks.de