Authors
Michał Łopata
Department of Environment Protection Engineering, University of Warmia and Mazury, Olsztyn, Poland
Helena Gawrońska
Department of Environment Protection Engineering, University of Warmia and Mazury, Olsztyn, Poland
© 2008 Michał Łopata, Helena Gawrońska, published by University of Gdańsk
This work is licensed under the Creative Commons License.