Não informado. Soil and land-use surveys. University of the West Indies, Department of Soil Science.
Chicago-referens (17:e uppl.)Não informado. Soil and Land-use Surveys. St. Augustine, Trinidad e Tobago: University of the West Indies, Department of Soil Science.
MLA-referens (8:e uppl.)Não informado. Soil and Land-use Surveys. University of the West Indies, Department of Soil Science.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.
