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Polish Journal of Ecology > 2012 > Vol. 60, nr 2 > 291-30
Polish Journal of Ecology > 2010 > Vol. 58, nr 2 > 241-248
Polish Journal of Ecology > 2012 > Vol. 60, nr 2 > 291-30
Polish Journal of Ecology > 2010 > Vol. 58, nr 2 > 241-248