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[Subject: Industrial Oils, Fats, Waxes, Gases]
Translated by: POVL H. RIIS-KNUDSEN
Translated in 81 languages
[Subject: Chemistry]
Translated by: DAVID LAURENT
Translated in 10 languages
[Subject: Aves (Birds)]
Translated in 73 languages
[Subject: Idiomatic Expressions]
Translated in 7 languages