THREE WEEK, 29-PAGE UNITFilm unit over Academy-Award winning motion picture with four nominations and two Oscars to its credit. This gritty drama includes issues about American regionalism, poverty and the driving force of unionism in a town where it is a bane, and the collective strength among poor Whites and Blacks. At the center piece is an outspoken divorcee, one whose stained reputation in the Southern town marks her and makes her an unlikely heroine. Though the film is rated PG, it is reco