Não informado. (1948). Electronic application bulletin. Philips Gloeilampenfabrieken.
Lua i Stíl Chicago (17ú heag.)Não informado. Electronic Application Bulletin. Eindhoven, Holanda: Philips Gloeilampenfabrieken, 1948.
Lua MLA (8ú heag.)Não informado. Electronic Application Bulletin. Philips Gloeilampenfabrieken, 1948.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.