ZAGREB, July 12 (Hina) - The fifth anniversary of UNESCO's proclamation of the Croatian-Hungarian Mura-Drava-Danube cross-border biosphere reserve and the recent proclamation of UNESCO's Backo Podunavlje biosphere reserve in Serbia were marked in Letenye, Hungary on Wednesday.
5fth anniversary of UNESCO's Croatian-Hungarian Mura-Drava-Danube biosphere reserve marked
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