Não informado. (1920). Mineralogical Abstracts. Mineralogical Society of Great Britain.
Lua i Stíl Chicago (17ú heag.)Não informado. Mineralogical Abstracts. London: Mineralogical Society of Great Britain, 1920.
Lua MLA (8ú heag.)Não informado. Mineralogical Abstracts. Mineralogical Society of Great Britain, 1920.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.