🌐EnglishEnglishBahasa IndonesiaEspañolFrançaisItalianoPortuguêsSvenskaTiếng ViệtTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ8130115· pop 29Category:1920 in scienceWikimedia categoryAvailable in 28 languagesEspañolFrançais中文日本語РусскийPortuguêsItalianoالعربيةAzerbaijaniBasque