Invited keynote speaker @Studium Generale Amersfoort (March 16,2014)
Piek Vossen invited keynote speaker at Studium Generale Amersfoort by De Spullenmannen, Amersfoort, the Netherlands, March 16, 2014
Piek Vossen invited keynote speaker at Studium Generale Amersfoort by De Spullenmannen, Amersfoort, the Netherlands, March 16, 2014