Authors
Agnieszka Pociecha
Department of Freshwater Biology PAS, Institute of Nature Conservation, Kraków, Poland
Tomasz Heese
Division of Environmental Biology, Technical University of Koszalin, Koszalin, Poland
© 2007 Agnieszka Pociecha, Tomasz Heese, published by University of Gdańsk
This work is licensed under the Creative Commons License.