Não informado. (1970). Communications in Soil Science and Plant Analysis. Marcel Dekker.
Lua i Stíl Chicago (17ú heag.)Não informado. Communications in Soil Science and Plant Analysis. New York: Marcel Dekker, 1970.
Lua MLA (8ú heag.)Não informado. Communications in Soil Science and Plant Analysis. Marcel Dekker, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.