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Detection of underground cavities by combining gravity, magnetic and ground penetrating radar surveys: a case study from the Zaragoza area, NE Spain

GeophysicsRadarGeotechnical EngineeringApplied GeophysicsRadar SurveysEngineeringUnderground InfrastructureUnderground CavitiesNe SpainUnderground SpaceCivil EngineeringGround-penetrating RadarUnderground Construction