Authors
Agnieszka Napiórkowska-Krzebietke
Department of Hydrobiology, Inland Fisheries Institute, Olsztyn, Poland
© 2015 Agnieszka Napiórkowska-Krzebietke, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.