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[Subject: Generalities]
Translated by: STEVEN STENFERT
Translated in 56 languages
Translated by: DAVID DUPUIS
Translated in 40 languages
Translated in 17 languages
[Subject: Mechanics]
Translated by: DAVID LAURENT
Translated in 8 languages
[Subject: Zoology]
- vogels die samen vliegen
Translated in 4 languages