Charles Sheeler : National Collection of Fine Arts. Smithsonian Institution, Washington, D. C., 10 October through 24 November, 1968, Philadelphia Museum of Art, Philadelphia, PA, 10 January through 16 February, 1969, Whitney Museum of American Art, New York, 11 March through 27 April, 1969 / essays by Martin Friedman, Bartlett Hayes, Charles Millard . - Washington : Smithsonian Institution Press, 1968. - 155 s. : kuv. (vär., mv.) ; 21 X 27 cm