The Wolf Trap Foundation in association with Foundation for American Dance presents "City Center Joffrey Ballet," by arrangement with Harold Shaw, Robert Joffrey, artistic director, Gerald Arpino, assistant director, William Crawford, general administrator, Walter Hagen, music director, Thomas Skelton, lighting design, Basil Thompson, ballet master, Molle Regan, assistant administrator, Seymour Lipkin, principal guest conductor, Jennifer Tipton, production supervisor, James Howell, assistant to Mr. Arpino, "The Green Table," danse macabre in eight scenes (created between two wars as a memorial for the Unknown), choreography by Kurt Jooss, lighting by Thomas Skelton, music by Frederic Cohen, conducted by Walter Hagen, pianists: Stanley Babin and Mary Roark, set and costumes after the originals by Hein Heckroth, masks after designs by Hermann Markard (American supervision by William Pitkin).