edward valstar tedx profile 12 February 2015/by Site Default https://www.tedxdelft.nl/wp-content/uploads/2016/02/TEDxDelftLogoWebsite.jpg 0 0 Site Default https://www.tedxdelft.nl/wp-content/uploads/2016/02/TEDxDelftLogoWebsite.jpg Site Default2015-02-12 15:18:352015-02-12 15:18:35edward valstar tedx profile