Authors
Elżbieta Szeląg-Wasielewska
Department of Water Protection, Adam Mickiewicz University, Poznań, Poland
Waldemar Stachnik
Department of Water Protection, Adam Mickiewicz University, Poznań, Poland
© 2010 Elżbieta Szeląg-Wasielewska, Waldemar Stachnik, published by University of Gdańsk
This work is licensed under the Creative Commons License.