1. J. R. Wang and T. J. Schmugge, “An empirical model for the complex dielectric permittivity of soils as a function of water content,” IEEE Trans. Geosci. Remote Sensing GE-18 (1980).
2. F. E. Geiger and Williams, “Dielectric constants of soils at microwave frequencies,” NASA Rep., NASA TMS-65987 (1972).
3. S. Haddad, M. J. H. Salman, and R. K. Jha, “Effects of dust/sandstorms on some aspects of microwave propagation,” in Proc. of URSI Com. F, Symp., 1983, Louvain (Louvain, 1983).
4. S. J. Al-Bader and M. M. Dawoud, “Measurements of the refractive index of soils and airborne particles,” in Proc. of URSI Com. F, Symp., 1983, Louvain (Louvain, 1983).
5. S. M. Sharrief and S. I. Ghobrial, “X-band measurements of the dielectric constant of dust,” in Proc. of URSI Com. F. Symp., 1983, Louvain (Louvain, 1983).