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I know the Bulgarian-language article (bg:Рожен (проход)) that this article is a translation of says that the Byala Reka is a tributary of the Crna River (Vardar), but this can't be right. The Crna is in North Macedonia, far to the west of the area discussed here. The Byala Reka (Luda Reka tributary) is in the Rhodopes and is, as the disambiguation says, a tributary of the Luda reka. Both of these rivers are in the same region as the Arda (Maritsa tributary). I don't know how the North Macedonian river made it into the Bulgarian article, but I have changed the information here, to what seems to be the correct river. —ShelfSkewedTalk 06:46, 6 April 2024 (UTC)[reply]