The X-Rated Girl & Others Lot (Film Ventures International, 1979), Lot #51399

Movies get a ratings system – Dan The Man Trivia

The Best X-Rated Movies in History

Best X-Rated Movies: Adult Movies That Are Actually Good - Thrillist

This Film Is Not Yet Rated (Movie 2006): MPAA Gets an 'F

TIL the 1983 film Scarface was originally given an X rating three times in a row by the MPAA. On the fourth appeal, the film was finally given an R rating, but

On this Day in Movie History, November 1, 1968: MPAA Film Rating System Becomes Effective – Michigan Movie Magazine

The movie ratings G, PG, PG-13, and R are obvious in why they are different. But what are the difference between NC-17, X, and Unrated? - Quora

Review: 'Fast X” gears up for more road rage, sets up sequels - Brainerd Dispatch

X-Rated Movies at Yerba Buena – Bayflicks

70s Rewind: INSERTS, Place an X Over Its Heart