Não informado. (1967). Environmental Science & Technology. American Chemical Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Environmental Science & Technology. Easton, Pa: American Chemical Society, 1967.
Lua MLA (8ú heag.)Não informado. Environmental Science & Technology. American Chemical Society, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.