1 résultat(s) pour 'chemical elements'
Chemical elements (en)
عناصر كيميائية (ar), Elemento químico (es), Élément chimique (fr), Химические элементы (ru)
Carbon, Isotopes, Phosphorus, Sulphur
Biochemicals, Chemicals, Hydrogen, Materials, Metals, Nitrogen, Oxygen
Science
> Chemical sciences
عناصر كيميائية (ar), Elemento químico (es), Élément chimique (fr), Химические элементы (ru)
http://vocabularies.unesco.org/thesaurus/concept139