@misc{Jakubik_Beata_Molluscs, author={Jakubik, Beata}, howpublished={online}, publisher={Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej}, language={eng ; pol}, type={artykuł}, title={Molluscs (Mollusca) in selected small rivers of the Mazovian Lowland}, keywords={molluscs, rivers, Mazovian Lowland, Poland}, }