[es] Circonio

[ca] Zirconi

[en] Zirconium

[fr] Zirconium

Titanio

http://id.loc.gov/authorities/subjects/sh85149899

http://data.bnf.fr/ark:/12148/cb119820825

http://lemac.sgcb.mcu.es/Autoridades/LEMAC201237448/concept

Circonio--Compuestos

Circonio--Compuestos--Tesis doctorales

Circonio--Metalurgia

Circonio--Mozambique

Circonio--Tesis doctorales