Authors
Krzysztof Szoszkiewicz
Department of Ecology and Environmental Protection, Poznań University of Live Sciences, Poznań, Poland
Janina Zbierska
Department of Ecology and Environmental Protection, Poznań University of Live Sciences, Poznań, Poland
Ryszard Staniszewski
Department of Ecology and Environmental Protection, Poznań University of Live Sciences, Poznań, Poland
Szymon Jusik
Department of Ecology and Environmental Protection, Poznań University of Live Sciences, Poznań, Poland