What are ISO 639 language codes?

Nature volume 534, pages 631–639 Cite this article 67k Nature 534, 631–639 nature18307

London Buses route 639 is a Transport for London contracted bus route in London, England Running between Roehampton and Battersea, it is operated by

639ความหมาย IX639 Flight Tracker - Track the real-time flight status of Air India Express IX 639 live using the FlightStats Global Flight Tracker

639ความหมาย FL 639 is a field-oriented flotation radial tire also suitable for spreading applications Its wide footprint area ensures low soil compaction resulti