Authors
Krystian Obolewski
Department of Water Ecology, Pomeranian Academy, Słupsk, Poland
Agnieszka Strzelczak
Institute of Chemistry and Environmental Protection, Szczecin University of Technology, Szczecin, Poland
© 2008 Krystian Obolewski, Agnieszka Strzelczak, published by University of Gdańsk
This work is licensed under the Creative Commons License.