ISO 639-1: Codes for the representation of names of languages -- Part 1: Alpha-2 code
iso 639-1: codes for the representation of names of languages -- part 1: alpha-2 code
ISO 639-1: Codes for the representation of names of languages -- Part 1: Alpha-2 code
iso 639-1: codes for the representation of names of languages -- part 1: alpha-2 code