TY - CONF A1 - Becker, Roland A1 - Castro, E. A1 - Lopez, Cristina A1 - Guevara, Alicia A1 - Pabello Poegner, Guiomar A1 - PĂ©rez, M. A1 - Mitani, Y. A1 - Buge, Hans-Gerhard T1 - International co-operation in the development and application of matrix reference materials. Case study: Polycycric aromatic hydrocarbons (PAH) and total petrol hydrocarbons (TPH) in soil T2 - BERM 9 - 9th International Symposium on Biological and Environmental Reference Materials T2 - BERM 9 - 9th International Symposium on Biological and Environmental Reference Materials CY - Berlin, Germany DA - 2003-06-15 PY - 2003 AN - OPUS4-4794 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -