Graf, D.L. (2007). Palearctic freshwater mussel (Mollusca: Bivalvia: Unionoida) diversity and the comparative method as species concept. Proceedings of the Academy of Natural Sciences of Philadelphia, 156: 71-88. Philadelphia [June].
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Graf, D.L.
2007
Palearctic freshwater mussel (Mollusca: Bivalvia: Unionoida) diversity and the comparative method as species concept
Proceedings of the Academy of Natural Sciences of Philadelphia