Authors
Robert Czerniawski
Department of General Zoology, University of Szczecin, Szczecin, Poland
Józef Domagała
Department of General Zoology, University of Szczecin, Szczecin, Poland
© 2011 Robert Czerniawski, Józef Domagała, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.