Duluth will stage a Sportsmans Show April 11-14 at the Duluth Arena. Along with the usual displays of fishing and camping equipment, they'll have a 12-act vaudeville show, topped by the Osmond Brothers, a singing group that gained stardom by singing with Andy WilliamsTomorrow the Harlem Globe Trotters are expected to play before about 5,400 fans at the Duluth Arena, according to Ole Haugsrud.