https://events.ccc.de/en/2017/03/02/gpn17-call-for-participation/
GPN17: Call for Participation - CCC Event Blog
call for participationccceventblog
https://media.ccc.de/v/gpn17-8593-sha2017_orga_meet_gpn17
SHA2017 Orga Meet @ GPN17 - media.ccc.de
SHA2017 Orga Meet @ GPN17
orgameetmediacccde