@book{Abad-1928,
  address    = {Madrid},
  author     = {Abad, R. P. Isidoro},
  publisher  = {Editorial del Corazón de María},
  title      = {Elementos de gramática bubi},
  year       = {1928},
  iso_code   = {bvb},
  olac_field = {syntax; general_linguistics; semantics; typology},
  wals_code  = {bub}
}