Can someone help me find links to journals/ebooks for my research paper?

I'm researching about the discrimination happening in the movie "The Greatest Showman" so I also need to research the general understanding of discrimination in America in the mid to late 19th century but every article that pops up is about racial discrimination and any article about other kinds of discrimination is blocked by a paywall. This is driving me insane I swear to god like yeah, good for you native Americans to be noticed BUT I'M NOT JUST RESEARCHING ABOUT RACIAL DISCRIMINATION COME ON CLASSISM IS ALSO A THING PEOPLE