https://www.youtube.com/watch?v=cmC8UJs9VYo
Paris Metro Expansion 1900-2030 (Métro, RER, Tram, Grand Paris Express) https://www.youtube.com/watch?v=ppFzg6dIpS4
The future of Paris Metro https://www.youtube.com/watch?v=fEqAMiUOHVE
The Paris Metro https://www.youtube.com/watch?v=9sLxsIYjxrk
