Não informado. (1945). Bulletin d' informations techniques. Charbonnages de France.
Lua i Stíl Chicago (17ú heag.)Não informado. Bulletin D' Informations Techniques. Paris: Charbonnages de France, 1945.
Lua MLA (8ú heag.)Não informado. Bulletin D' Informations Techniques. Charbonnages de France, 1945.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.