Author: Regionalʹnai︠a︡ nauchno-prakticheskai︠a︡ konferent︠s︡ii︠a︡ "Svedomskie v sele Zavod-Mikhaĭlovskiĭ" (1999 Chaĭkovskiĭ, Permskai︠a︡ oblastʹ, Russia)