Ann R. Roberts, daughter of Mary Clark Rockefeller and the late Nelson A. Rockefeller, Vice President and Governor of New York; was married at her home in New Yorkin March 1979 to T George Harris of Princeton. N.J., a Journalist and magazine editor. Clare M. Pierson, a Middlebury College alumna, was maid of honor for her mother. Joseph, Mary Louise and Rachel Pierson, the bride's other children also took part in the service. It was the third marriage for the bride, who will continue to use the maiden name of her maternal grandmother, the late Elizabeth Roberts Clark. The bride's first marriage, to the Rev. Robert L. Pierson, an Episcopal priest, ended in divorce, as did her second, to Lionel R. Coste Jr., an architect. The bride graduated from the Brearley School and Wellesley College. She is president of the Rockefeller Family Fund and a trustee of the Michael Rockefeller Fellowship Fund at Harvard and the Museum of the American Indian.