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[Subject: Relation Of Natural Factors]
Translated by: KATRIN HELD
Translated in 14 languages
[Subject: Sociology]
Translated by: ROBERT GRIGOR BAXTER
Translated in 9 languages
[Subject: Medical Equipment]
Translated in 5 languages
[Subject: General Management]
Translated in 4 languages
[Subject: Generalities]
Translated in 15 languages