Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Réseau Express Régional:

"

As its instigator, RATP was granted authority to run the new link. The embryonic (and as yet unnamed) RER was not properly conceived until the 1965 Schéma directeur d'aménagement et d'urbanisme (roughly: 'master plan for urban development'), which envisioned an H-shaped network with two north–south routes.[3] Between 1969 and 1970, RATP purchased the Vincennes and Saint-Germain lines from SNCF, as the basis for the east–west link.[citation needed] Only a single north–south route crossing the Left Bank has so far come to fruition, although the Métro's line 13 has been extended to perform a similar function.