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Polish Journal of Ecology > 2007 > 55 > 2
Acta Hydrobiologica > 1997 > 39 > 1-2
Acta Theriologica > 1994 > 39 > 1
Polish Journal of Ecology > 2007 > 55 > 2
Acta Hydrobiologica > 1997 > 39 > 1-2
Acta Theriologica > 1994 > 39 > 1