1. Carbonate;Allison,1965
2. Determining iron content in Mediterranean soils in partly vegetated areas, using spectral reflectance and imaging spectroscopy;Bartholomeus;Int. J. Appl. Earth Obs. Geoinf.,2007
3. Bulk density;Blake,1986
4. Environmental covariates for digital soil mapping in the western USA;Boettinger,2010
5. Landsat spectral data for digital soil mapping;Boettinger,2008