Não informado. (1967). Abstracts. Weed Science Society of America.
Lua i Stíl Chicago (17ú heag.)Não informado. Abstracts. Champaign, Ill: Weed Science Society of America, 1967.
Lua MLA (8ú heag.)Não informado. Abstracts. Weed Science Society of America, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.