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[Subject: Ecology]
Translated by: SERGIO CRAGNOLINI
Translated in 15 languages
[Subject: Physics]
Translated in 13 languages
Translated in 10 languages
[Subject: Chemistry]
Translated in 7 languages
Translated in 5 languages
[Subject: Electricity & Electronics]
Translated in 4 languages
[Subject: Law]
Translated in 3 languages
[Subject: Heating, Ventilating, Air Conditioning]
[Subject: Generalities]
Translated in 2 languages