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Lua i Stíl Chicago (17ú heag.)British Society of Soil Science. The Journal of Soil Science. Oxford, Inglaterra: Blackwell Scientific Publications, 1949.
Lua MLA (8ú heag.)British Society of Soil Science. The Journal of Soil Science. Blackwell Scientific Publications, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.