@book{seelwische1990,
  address   = {Asunción},
  author    = {Seelwische, José},
  pages     = {489},
  publisher = {Centro de Estudios Antropológicos, Universidad Católica},
  title     = {Diccionario nivaclé: nivaclé-castellano, castellano-nivaclé},
  year      = {1990}
}