Author: Kraevai︠a︡ nauchno-prakticheskai︠a︡ konferent︠s︡ii︠a︡ "Ėkologo-kraevedcheskie problemy Stavropolʹi︠a︡" (13th 2008 Stavropolʹ (Stavropolʹskiĭ kraĭ, Russia))