Distribution of micro- (Fe, Zn, Cu, and Mn) and risk (Al, As, Cr, Ni, Pb, and Cd) elements in the organs of Rumex alpinus L. in the Alps and Krkonoše Mountains ac* Michaela Jungová, a b Michael O. Asare, a Vladimíra Jurasová, a Michal Hejcman
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