| Jean Demmeni Objects of worship, held by the Kayans on the Upper Mahakam. From left to right Tekok, Usu Bruwa, Bowo Nangan, Telu hina, Tawu Nangan [Borneo expedition to Central-Borneo led by Dr. A.W. Nieuwenhuis] 1896-1897 Photograph 8 x 10.5 cm Leiden University Library Royal Netherlands Institute of Southeast Asian and Caribbean Studies (KITLV), Accession number: 25796 LL/90583
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