Notebook C4: Selected Research Papers of Don Laycock on Languages in Papua New Guinea: Dia, Ningil, Urat. Don Laycock (compiler); Don Laycock (researcher). n.d. Pacific And Regional Archive for Digital Sources in Endangered Cultures (PARADISEC). oai:paradisec.org.au:DL2-004; Manning, Margaret and Naomi Saggers. 1977. A tentative phonemic analysis of Ningil. In Richard Loving (ed.), Phonologies of five P.N.G. languages (Workpapers in Papua New Guinea Languages 19), 49-71. Ukarumpa: Summer Institute of Linguistics.