https://theparismetro.com/
The Paris Metro – The 50th Anniversary of The Paris Metro
the paris metroanniversary
https://googlemapsmania.blogspot.com/2013/08/navigating-paris-metro-on-google-maps.html
Navigating the Paris Metro on Google Maps
Maps Mania is a blog dedicated to tracking the very best digital interactive maps on the internet and the tools used to create them.
the paris metroon googlenavigatingmaps