1. Introduction2. Potential Geophysical Fields: Similarity and Difference3. Different Kinds of Noise and Ways for their Removal4. Qualitative Analysis of Potential Fields5. Quantitative Analysis of Potential Field Anomalies6. Algorithms for Combined 3D Modelling of Gravity and Magnetic Fields7. Methodology of 3D combined gravity-magnetic modelling 8. Studying Deep Structure9. Searching Economic Minerals10. Searching and localization of Water Reservoirs; Mapping of Water Basins11. Environmental Geophysics12. Archaeological Geophysics13. Conclusion