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 April 19, 2024. https://soil-organisms.org/index.php/SO/article/view/67.