1. ASTM. 1997a. Standard guide for general planning of waste sampling, p.460-469, inJ. Azara, N.C. Baldini, E. Barszcewski, L. Bernhardt, E.L. Gutman, J.G. Kramer, C.M. Leinweber, V.A. Mayer, P.A. McGee, T.J. Sandler, and R.F. Wilhelm (eds.), Standards on Environmental Sampling, 2nd ed., American Society for Testing Materials, West Conshohocken, PA.
2. ASTM. 1997b. Standard guide for sampling strategies for heterogeneous wastes, p.521-537, inJ. Azara, N.C. Baldini, E. Barszcewski, L. Bernhardt, E.L. Gutman, J.G. Kramer, C.M. Leinweber, V.A. Mayer, P.A. McGee, T.J. Sandler, and R.F. Wilhelm (eds.), Standards on Environmental Sampling, 2nd ed., American Society for Testing Materials, West Conshohocken, PA.
3. Sampling strategies for soil water content to estimate evapotranspiration
4. Dispersion parameters for undisturbed partially saturated soil
5. Estimation of soil properties and wheat yields on complex eroded hills using geostatistics and thematic mapper images