Não informado. (1955). Technical notes for the rubber industry. Bayer AG.
Lua i Stíl Chicago (17ú heag.)Não informado. Technical Notes for the Rubber Industry. Leverkusen, Alemanha: Bayer AG, 1955.
Lua MLA (8ú heag.)Não informado. Technical Notes for the Rubber Industry. Bayer AG, 1955.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.