Authors
Piotr Klimaszyk
Department of Water Protection, University of Adam Mickiewicz, Poznań, Poland
Damian Heymann
Student Scientific Society of the Faculty of Biology, University of Adam Mickiewicz, Poznań, Poland
© 2011 Piotr Klimaszyk, Damian Heymann, published by University of Gdańsk
This work is licensed under the Creative Commons License.