OLSON, G. W. (1981). Soils and the environment: Aguide to soil surveys andtheir applications. Champman and Hall.
Chicago-referens (17:e uppl.)OLSON, Gerald W. Soils and the Environment: Aguide to Soil Surveys Andtheir Applications. New York: Champman and Hall, 1981.
MLA-referens (9:e uppl.)OLSON, Gerald W. Soils and the Environment: Aguide to Soil Surveys Andtheir Applications. Champman and Hall, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.