You can find a detailed map of the Paris RER on the Paris By Train. The map is pretty small, so you are going to have to click and zoom in on it to see any details.
Champigny - Paris RER - was created in 1859.
Auber - Paris RER - was created in 1971.
ALL RER stations in Paris are underground, and some in the suburb too. out of Paris, most RER stations are ground level or elevated.
Joinville-le-Pont - Paris RER - was created in 1859.
Épinay-sur-Seine - Paris RER - was created in 1908.
You take the RER A
1p
there are five RER lines in Paris (ABCDE) - They are operated by the public transportation service RATP - (interactive maps in link)
A common nickname for the RER (Réseau Express Régional) in France, particularly in the Paris region, is "le RER." Sometimes, it's informally referred to as "le train de banlieue," meaning "suburban train," as it connects central Paris to its suburbs. Each line of the RER is also often referred to by its letter designation, such as "RER A" or "RER B."
The Latin Quarter is part of Paris.
There is and underground section in Paris, but the route of the RER to Versailles is nearly all above ground as regular trains.
RER