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[Subject: Light & Paraphotic Phenomena]
Translated in 204 languages
[Subject: Generalities]
Translated by: ALPHONSE BAYINGANA
Translated in 74 languages
[Subject: Physics]
- inekhetivu emnyama
Translated in 34 languages
Translated in 24 languages
[Subject: American]
- iindaba ezimbi
Translated in 22 languages