Serra Hills
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Piore River (1)
- Warapu [wra] (A language of Papua New Guinea)
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Puari (1)
- Puare [pux] (A language of Papua New Guinea)
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Rawo-Main Serra (2)
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Main Serra (1)
- Womo [wmx] (A language of Papua New Guinea)
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Rawo (1)
- Rawo [rwa] (A language of Papua New Guinea)
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Main Serra (1)