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Polish Journal of Environmental Studies > 2010 > 19 > 2 > 387-396
Polish Journal of Ecology > 2009 > 57 > 2 > 217-227
Polish Journal of Environmental Studies > 2008 > 17 > 1 > 39-50
Polish Journal of Environmental Studies > 2010 > 19 > 2 > 387-396
Polish Journal of Ecology > 2009 > 57 > 2 > 217-227
Polish Journal of Environmental Studies > 2008 > 17 > 1 > 39-50