Comparative Assessment of the Resistance to Lead (Pb) Pollution of Forest, Forest-Steppe, Steppe, and Mountain-Meadow Soils of the Central Ciscaucasia and the Caucasus Regions oleh D. I. Moshchenko, Sergey I. Kolesnikov, A. A. Kuzina, Kamil S. Kazeev, Tatiana M. Minkina, A. A. Mezhenkov, Y. A. Litvinov, Sudhir S. Shende, Saglara S. Mandzhieva, Svetlana N. Sushkova, Valery P. Kalinitchenko