An American perspective : nineteenth-century art from the collection of Jo Ann & Julian Ganz ; [National Gallery of Art, Washington, october 4, 1981 - january 31, 1982 ; Amon Carter Museum, Fort Worth, march 19 - may, 23, 1982 ; Los Angeles County Museum of Art, july 6 - september 26, 1982] / John Wilmerding ; Linda Ayres ; Earl A. Powell