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Brown, D. S. (1988). Sierraia: rheophilous West African river snails (Prosobranchia: Bithyniidae). Zoological Journal of the Linnean Society. 93(4): 313-355.
Brown, D. S. (1988). Sierraia: rheophilous West African river snails (Prosobranchia: Bithyniidae). Zoological Journal of the Linnean Society. 93(4): 313-355.
