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https://uzspb.org/2018/12/26/%d0%bf%d0%b5%d1%80%d0%b5%d0%bf%d0%b8%d1%81%d1%8c-%d0%b2%d0%be%d0%b4%d0%bd%d0%be-%d0%b1%d0%be%d0%bb%d0%be%d1%82%d0%bd%d1%8b%d1%85-%d0%bf%d1%82%d0%b8%d1%86-%d0%bf%d0%be%d0%bc%d0%be%d0%b6%d0%b5%d0%bc/
Перепись водно-болотных птиц: поможем в сборе данных?