TY - CONF A1 - Wiggenhauser, Herbert A1 - Streicher, Doreen A1 - Algernon, Daniel A1 - Wöstmann, Jens A1 - Behrens, Matthias T1 - Automated application and combination of non-destructive echo methods for the investigation of post-tensioned concrete bridges T2 - Concrete Platform 2007 T2 - Concrete Platform 2007 CY - Belfast, Northern Ireland DA - 2007-04-19 PY - 2007 AN - OPUS4-14773 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -