@misc{10098,
  author = {Laycock, Donald C.},
  title  = {Sepik Languages: Checklist and Preliminary Classification (Pacific Linguistics: Series B 25). Canberra: Research School of Pacific and Asian Studies, Australian National University; Bugenhagen, Salme E. and Mary Martens. 1977. A tentative phonemic statement in Yil in West Sepik province. Workpapers in Papua New Guinea Languages 19: 29-48. Ukarumpa: Summer Institute of Linguistics; Rosetta Project (data supplied by Timothy Usher).},
  year   = {1973}
}