Stolbovoi, V. <https://pure.iiasa.ac.at/view/iiasa/2618.html> & Fischer, G. <https://pure.iiasa.ac.at/view/iiasa/89.html>  (1996).  Georeference soil degradation database for Russia.   In: Proceedings of 9th Conference of the International Soil Conservation Organization (ISCO), 26-30 August 1996.