@book{Espinosa-Perez-1955,
  address    = {Madrid},
  author     = {Espinosa Perez, P. Lucas},
  publisher  = {Consejo Superior de Investigaciones Cientificas, Instituto Bernardino de Sahagun},
  title      = {Contribuciones lingüisticas y etnograficas sobre algunos pueblos indigenas del Amazonas peruano},
  year       = {1955},
  iso_code   = {snn},
  olac_field = {general_linguistics; syntax; typology},
  wals_code  = {sin}
}