text: That's probably not regarded as part of the civil rights era in the US.  You may want to try using different terminology.  Maybe a law library visit would help.  You could try to find what would be some of the earliest lawsuits aimed at enforcing federal civil rights legislation that was put in place during the civil rights era.  Human Rights Watch may also have some information although I don't know if they are concerned with anything that far in the past.  Good luck.