1. Institute of Soil Science and Environmental Protection; Wroclaw University of Environmental and Life Sciences; Wroclaw Poland
2. Department of Geography; University of Zürich; Zürich Switzerland
3. Laboratory of Ion Beam Physics; ETH Zürich; Zürich Switzerland
4. Institute of Geological Sciences, Laboratory of Palynology; University of Wroclaw; Wroclaw Poland
5. Department of Experimental Petrography, Institute of Geological Sciences; University of Wroclaw; Wroclaw Poland
6. Department of Soil Science and Land Protection; Poznań University of Life Sciences; Poznan Poland