Alexander Militarev & Olga Stolbova. "Etymological Database of Afrasian languages (AADB)". The Tower of Babel. Center of Comparative Linguistics, Russian State University for the Humanities. Archived from the original on 2021-01-11. Retrieved 2021-06-05.
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Alexander Militarev & Olga Stolbova. "Etymological Database of Afrasian languages (AADB)". The Tower of Babel. Center of Comparative Linguistics, Russian State University for the Humanities. Archived from the original on 2021-01-11. Retrieved 2021-06-05.