@book{Endzelin-1922,
  address    = {Riga},
  author     = {Endzelin, J.},
  publisher  = {Gulbis},
  title      = {Lettische Grammatik},
  year       = {1922},
  iso_code   = {lav},
  olac_field = {general_linguistics; syntax; typology},
  wals_code  = {lat}
}