TY - CONF A1 - Unger, Wolfgang T1 - Summaries of achievements and future activities of the CCQM Surface Analysis Working Group (SAWG) T2 - 20 Years of the CCQM: Progess made, inpact provided, lessons learned, and future challenges T2 - 20 Years of the CCQM: Progess made, inpact provided, lessons learned, and future challenges CY - Paris, France DA - 2013-04-17 PY - 2013 AN - OPUS4-28800 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -