Polish Journal of Environmental Studies
Polish Journal of Environmental Studies > 2007 > 16 > 3 > 427-431
Polish Journal of Environmental Studies > 2008 > 17 > 5 > 823-826
Polish Journal of Environmental Studies > 2009 > 18 > 2 > 265-272
Polish Journal of Environmental Studies > 2007 > 16 > 3 > 427-431
Polish Journal of Environmental Studies > 2008 > 17 > 5 > 823-826
Polish Journal of Environmental Studies > 2009 > 18 > 2 > 265-272