Symposium on Detection of Subsurface Cavities 12-15 July 1977. Open PDF Document Details Document Type Technical Report Publication Date Oct 01, 1977 Accession Number ADA046823 Tags Communities of Interest Advanced Electronics Energy and Power Technologies Sensors Weapons Technologies DTIC Thesaurus Topics Civil Engineering Computers Construction Detection Detectors Engineering Engineers Geography Geophysics Geotechnical Engineering Groundwater High Resolution Measurement Middle East Surface Waves Urban Areas Water Resources