Não informado. (1923). Journal of Scientific Instruments. Institute of Physics.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Scientific Instruments. London: Institute of Physics, 1923.
Lua MLA (8ú heag.)Não informado. Journal of Scientific Instruments. Institute of Physics, 1923.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.