Author: Nauchno-prakticheskai︠a︡ konferent︠s︡ii︠a︡ "Sostoi︠a︡nie i perspektivy osvoenii︠a︡ nedr, okhrana okruzhai︠u︡shcheĭ sredy I︠A︡roslavskoĭ oblasti i Verkhne-Volzhskogo regiona" (2004 I︠A︡roslavlʹ, Russia)