Training materials
Authors: Martin Čech
and Contributors: Björn Grüning or Daniel Sobral or Dannon Baker or Hadley Wickham or Marius van den Beek or Mark Beaumont
Authors: Martin Čech
and Contributors: Björn Grüning or Daniel Sobral or Dannon Baker or Hadley Wickham or Marius van den Beek or Mark Beaumont