Não informado. (1985). Biology and Fertility of Soils. Springer Verlag.
Lua i Stíl Chicago (17ú heag.)Não informado. Biology and Fertility of Soils. Berlin: Springer Verlag, 1985.
Lua MLA (8ú heag.)Não informado. Biology and Fertility of Soils. Springer Verlag, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.