Não informado. (1949). Agronomy Journal. American Society of Agronomy.
Lua i Stíl Chicago (17ú heag.)Não informado. Agronomy Journal. Madison, Wis: American Society of Agronomy, 1949.
Lua MLA (8ú heag.)Não informado. Agronomy Journal. American Society of Agronomy, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.