Papers by S.A. Wurm 'Materials on languages in danger of disappearing in the Asia-Pacific region', S.A. Wurm 'Kaki Ae (formerly known as Raepa Tati) a potentially endangered language in southern Papua New Guinea', John M. Clifton 'The Kaki Ae language', S.A. Wurm 'Musom, an endangered language in northeastern Papua New Guinea', Susanne Holzknecht 'Musom morphology and grammar sketch',Susanne Holzknecht 'Musom word list', S.A. Wurm 'Aribwatsa, an almost extinct language in northeastern Papua New Guinea', Susanne Holzknecht 'Aribwatsa: A'lost' language of the Markham family Papua New Guinea?', Susanne Holzknecht 'Aribwatsa word list', S.A. Wurm 'Publications on languages in danger of disappearing in the Asia-Pacific region'. This volume, the first of similar volumes of reports on endangered languages in the Pacific and Southeast Asian area, contains grammatical outlines, word lists and texts with interlinear translation of three Papua New Guinea languages in danger of disappearing: Kaki Ae (Papuan, potentially endangered), Musom (Austronesian, endangered) and Aribwatsa (Austronesian, almost extinct).