The populations of the freshwater pearl mussel, Margaritifera margaritifera (Linnaeus, 1758), and the thick shelled river mussel, Unio crassus Philipsson, 1788, in Latvia
Titel:
The populations of the freshwater pearl mussel, Margaritifera margaritifera (Linnaeus, 1758), and the thick shelled river mussel, Unio crassus Philipsson, 1788, in Latvia