@misc{9927,
  author = {Campbell, Carl and Campbell, Jody},
  title  = {Yade grammar essentials. Ukarumpa: Unpublished Manuscript, Summer Institute of Linguistics.; Campbell, Carl and Jody Campbell. 2011. Yade Organised Phonology Data. ms.; Aannestad, Aidan, Carl Campbell, and Jody Campbell. 2020. Towards a grammar of the Yale language: taking another look at archived field data. Ukarumpa: Unpublished Manuscript, Summer Institute of Linguistics.},
  year   = {1987}
}