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[Subject: Athletic & Outdoor Sports & Games]
Translated by: KATRIN HELD
Translated in 6 languages
[Subject: Chemistry]
Translated in 2 languages
[Subject: Medical Sciences, Medicine]
Translated by: SYLVIA VERGARA
Translated in 11 languages
[Subject: Generalities]
Translated in 10 languages
[Subject: Language]
Translated in 7 languages