Training materials
Authors: Hadley Wickham
and Contributors: Mark Beaumont or Eija Korpelainen @eija, ekorpelainen@gmail.com or Pinar Alper or Hadley Wickham or James Johnson
Authors: Hadley Wickham
and Contributors: Mark Beaumont or Eija Korpelainen @eija, ekorpelainen@gmail.com or Pinar Alper or Hadley Wickham or James Johnson