Authors
Tomasz Suchowolec
Department of Hydrobiology, Institute of Biology, University of Białystok, Białystok, Poland
Andrzej Górniak
Department of Hydrobiology, Institute of Biology, University of Białystok, Białystok, Poland
© 2009 Tomasz Suchowolec, Andrzej Górniak, published by University of Gdańsk
This work is licensed under the Creative Commons License.