Não informado. Soil management abstracts. International Board for Soil Research and Management.
Chicago-Zitierstil (17. Ausg.)Não informado. Soil Management Abstracts. Bangkok: International Board for Soil Research and Management.
MLA-Zitierstil (8. Ausg.)Não informado. Soil Management Abstracts. International Board for Soil Research and Management.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.