Não informado. (1920). Meteorological Magazine. Meteorological Office.
Lua i Stíl Chicago (17ú heag.)Não informado. Meteorological Magazine. London: Meteorological Office, 1920.
Lua MLA (8ú heag.)Não informado. Meteorological Magazine. Meteorological Office, 1920.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.