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KITLV Demmeni J. Kayans that row canoe against the flow on the Upper Kapuas River Sungai Kapuas Central Borneo .tif nl Kajans die een prauw de BovenKapoeas opbomen MiddenBorneo Borneoexpeditie onder leiding van dr Nieuwenhuis en Kayans that row canoe against the flow on the Upper Kapuas River Sungai Kapuas Central Borneo Borneo