1 results for 'isotopes'
Isotopes (en)
نظائر (ar), Isotope (fr), Изотопы (ru), Isótopo (es)
Chemical elements
Radioisotopes
Science
> Chemical sciences
نظائر (ar), Isotope (fr), Изотопы (ru), Isótopo (es)
http://vocabularies.unesco.org/thesaurus/concept4986