Não informado. (1968). Weed Science. Weed Science Society of America.
Lua i Stíl Chicago (17ú heag.)Não informado. Weed Science. Champaign, Ill: Weed Science Society of America, 1968.
Lua MLA (8ú heag.)Não informado. Weed Science. Weed Science Society of America, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.