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المؤلفون: Gerhard E. Krammer, Jürgen Brüning, Stefan Lambrecht, Horst Sommer, Peter Werkhoff, Johannes Kaulen, Hans-Jürgen Bertram, Matthias Güntert
مصطلحات موضوعية: Horticulture, Bearing (mechanical), chemistry, Buchu leaf, law, chemistry.chemical_element, Sulfur, law.invention