(1985). Rare earth elements and yttrium.
Tohutoru Kātū Chicago (17th ed.)Rare Earth Elements and Yttrium. 1985.
Tohutoro MLA (9th ed.)Rare Earth Elements and Yttrium. 1985.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.
Tohutoro APA (7th ed.)