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[Subject: Water, Air, Space Transportation]
- Inom fllyg.
Translated by: BERNT JOHANSSON
Translated in 54 languages
[Subject: Architecture]
- Inledning
Translated in 27 languages
[Subject: Mechanics]
- Inledning, början.
Translated in 20 languages
[Subject: Chemistry]
Translated in 16 languages
[Subject: Generalities]
Translated in 10 languages