http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (1 page) : color illustrations
Alfisols -- Andisols -- Aridisols -- Entisols -- Geligols -- Histosols -- Inceptisols -- Mollisols -- Oxisols -- Spodosols -- Ultisols -- Vertisols.
Information about and photo of each of the 12 soil orders.