TY - CONF A1 - Wiggenhauser, Herbert T1 - Advanced NDT Methods for Quality Assurance of Concrete Structures T2 - 7th International Symposium on Non-destructive Testing in Civil Engineering (NDT-CE) T2 - 7th International Symposium on Non-destructive Testing in Civil Engineering (NDT-CE) CY - Nantes, France DA - 2009-06-29 PY - 2009 AN - OPUS4-20770 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -