Não informado. (1956). Philips telecommunication review. Philips Gloeilampenfabrieken.
Lua i Stíl Chicago (17ú heag.)Não informado. Philips Telecommunication Review. Eindhoven, Holanda: Philips Gloeilampenfabrieken, 1956.
Lua MLA (8ú heag.)Não informado. Philips Telecommunication Review. Philips Gloeilampenfabrieken, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.