Canyon Rating System - Road Trip Ryan

Rated X (TV Movie 2000) - IMDb

cinema history - Why would a movie that appears pornographic via it's rating (X) receive an Academy Award? - Movies & TV Stack Exchange

File:X MPAA.png - Wikipedia

Watch Quentin Tarantino Fave The Street Fighter, The First Movie To Get an X -Rating for Violence (NSFW)

IPX Waterproof Rating Guide – Hypergear US

Fritz the Cat (1972) JPK's Adventures in Cinema

The first animated feature to be given an X rating

Best Buy: X-Rated [DVD] [2015]

1970's X Rating Screen by GrayLord791 on DeviantArt

DREAMS ARE WHAT LE CINEMA IS FOR: LAST SUMMER 1969