@article{103002,
  author         = {Payne, Doris L.},
  journal        = {International Journal of American Linguistics},
  number         = {4},
  pages          = {447–474},
  title          = {Source of the Yagua Nominal Classification System},
  url            = {http://www.jstor.org/stable/10.1086/523773},
  volume         = {73},
  year           = {2007},
  abstract       = {The Yagua (Peba-Yaguan) classifier system shows a number of structural isomorphisms with Bora-Witotoan classifier systems. This is seen in the use of classifiers to derive new nouns from a variety of root types, and in what at first glance may appear to be agreement functions in some contexts. In both families, classifiers are required in numeral and demonstrative structures, and have similar discourse functions. However, there is actually little or no evidence that Yagua or Bora-Witotoan languages have borrowed classifier morphemes from each other. Internal to Yagua, it is possible that classifiers arose via a compounding process. The available historical records show that Yagua and Bora-Witotoan speakers have traversed the same geographic territory, leading us to conclude that there has been at least structural influence across language families.},
  citekeys       = {langsci237:payne2007},
  doi            = {10.1086/523773},
  hhtype         = {comparative (computerized assignment from "classification")},
  inlg           = {English [eng]},
  isreferencedby = {langsci237},
  issn           = {0020-7071},
  keywords       = {Amazonia, Nominal classification, South America, Yagua},
  lgcode         = {Yagua [yagu1244]},
  macro_area     = {South America},
  src            = {haspelmath, langsci, seifart}
}