1. Using ground-penetrating radar to study soil microvariability;Collins;Soil Sci. Soc. Am. J.,1987
2. Particle fractionation and particle-size analysis;Day,1965
3. Using ground-penetrating radar to increase the quality and efficiency of soil surveys;Doolittle,1987
4. The Application of Ground-Penetrating Radar to Geologic Investigations in Karst Terranes;Hearns,1987
5. Applications of Ground-Penetrating Radar to the Detection of Subsurface Cavities;Kuhns,1982