Author: Russia) Mezhregionalʹnai︢a︡ nauchno-prakticheskai︢a︡ konferent︠s︡ii︢a︡ "Ėkologii︢a︡ i biblioteka--nastoi︠a︡shchee i budushchee" (1998 I︠A︡roslavlʹ ,I︠A︡roslavskai︠a︡ oblastʹ