Mark, H. (1956). Resins, rubbers, plastics yearbook 1955.
Lua i Stíl Chicago (17ú heag.)Mark, H. Resins, Rubbers, Plastics Yearbook 1955. New York, Interscience Publishers, 1956.
Lua MLA (9ú heag.)Mark, H. Resins, Rubbers, Plastics Yearbook 1955. 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.