1. A discrete approach to automated mapping of multivariate systems;De Gruijter,1975
2. Computer production of soil maps. I. Production of grid maps by interpolation;Giltrap;Geoderma,1982
3. The representation of spatial data by grid cell or polygon;Lynch,1981
4. The recording and organisation of soil field data for computer areal mapping;Ragg;Geoderma,1977
5. Storing and processing data for soil and land use capability surveys;Rudeforth;J. Soil Sci.,1975