Xylander, Willi E. R., and Helga Zumkowski-Xylander. “Increasing Awareness for Soil Biodiversity and Protection : The International Touring Exhibition ‘The Thin Skin of the Earth’”. SOIL ORGANISMS 90, no. 2 (August 1, 2018): 79–94. Accessed May 15, 2024. https://www.soil-organisms.org/index.php/SO/article/view/67.