TY - CONF A1 - Wiggenhauser, Herbert T1 - Impact-Echo and Ultrasonic Testing of Concrete T2 - Training Courses: Investigation and Monitoring of Dams and Hydroelectric Basins in Georgia T2 - Training Courses: Investigation and Monitoring of Dams and Hydroelectric Basins in Georgia CY - Trieste, Italy DA - 2002-08-27 PY - 2002 AN - OPUS4-3870 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -