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Polish Journal of Environmental Studies > 2008 > 17 > 5 > 739-744
Medycyna Weterynaryjna > 2007 > 63 > 10 > 1181-1183
Polish Journal of Environmental Studies > 2008 > 17 > 5 > 739-744
Medycyna Weterynaryjna > 2007 > 63 > 10 > 1181-1183