New York City Ballet

Anthony Blum performs in the New York City Ballet production of ''Goldberg Variations.''

Edward Villella of the New York City Ballet performs with Sizamme Farrell in ''Jeux.''

Edward Villella of the New York City Ballet performs with Violette Verdy in ''La Source.''

Edward Villella of the New York City Ballet performs with Violette Verdy in ''La Source.''

Merrill Ashley, of the New York City Ballet, performs a leap in George Balanchine's ballet ''Ballo della Regina.''

Melissa Hayden and Edward Villella, both of the New York City Ballet, perform together in George Balanchine's ballet ''A Midsummer Night's Dream.''

Melissa Hayden and an unidentified dancer, both of the New York City Ballet, perform together in George Balanchine's ballet ''A Midsummer Night's Dream.''

Melissa Hayden and Edward Villella, both of the New York City Ballet, perform together with the ensemble in George Balanchine's ballet ''A Midsummer Night's Dream.''

Photographs of Arthur Mitchell of the New York City Ballet performing in George Balanchine's dance ''Agon.''

Two photographs on one sheet: Balerina Kay Mazzo of the New York City Ballet performs in George Balanchine's ''Nutcracker'' and informal portrait of Mazzo backstage at the same performance.