Authors
Piotr Skórczewski
Department of Experimental Biology, Pomeranian Pedagogical Academy, Słupsk, Poland
Zbigniew Mudryk
Department of Experimental Biology, Pomeranian Pedagogical Academy, Słupsk, Poland
© 2009 Piotr Skórczewski, Zbigniew Mudryk, published by University of Gdańsk
This work is licensed under the Creative Commons License.