Training materials
Difficulty level: Beginner
and Authors: Philip Krauss
and Contributors: Christophe Klopp or Cyril Pommier or Célia Michotey or Hélène Chiapello or Sabine Österle
Difficulty level: Beginner
and Authors: Philip Krauss
and Contributors: Christophe Klopp or Cyril Pommier or Célia Michotey or Hélène Chiapello or Sabine Österle