of Robert Adams (born 1937), Barbara Crane (born 1928), Frank Gohlke (born 1942), Robert Glenn Ketchum (born 1947), Clara Sipprell (1885–1975), Brett Weston (1911–1993), and Edward Weston (1886–1958). The ACMAA owns a complete set of prints from Richard Avedon's In the American West series, a project commissioned by the ACMAA in 1979. In recent years the museum has largely focused on acquiring and displaying photographs by contemporary artists including Dawoud Bey (born 1953), Sharon Core (born 1965), Katy Grannan (born 1969), Todd Hido (born 1968), Alex Prager (born 1979), Mark Ruwedel (born 1954), and Larry Sultan (1946–2009). Works on paper Much of America’s aesthetic, economic, and social history is found in works on paper, a category that includes drawings, prints, and watercolors. The ACMAA began to actively collect works on paper in 1967. The collection today numbers several thousand items by noted artists of the nineteenth and twentieth centuries to the present. Drawings and paintings range from preliminary studies to fully realized compositions. Most nineteenth-century prints originated as reproductions intended for dissemination to the public and depict subjects relevant to the American experience. Twentieth-century and later prints are fine art prints made by a variety of processes as a means of artistic self-expression. Prints that stem from early western surveys conducted by the United States War Department and the United States Department of the Interior are important components of the works on paper collection. These prints were typically based on field sketches by artists who accompanied the expeditions. They provide unique views of the western landscape, Indian life, natural history, ancient Spanish culture, and life in nineteenth-century American frontier communities. The Frémont Expeditions (1842–44), Emory Expedition (1846–47), Abert Expedition (1846–47), and Simpson Expedition (1849) are among the sources of western survey prints collected by the ACMAA. The ACMAA’s nineteenth-century print collection also includes a copy of the landmark Hudson River Portfolio (1821–25) based on the work of painter William Guy Wall (1792–after 1864) and engraver John Hill (1770–1850); original copper plate etchings of Native Americans as depicted in field studies by Karl Bodmer (1809–1893); a complete set of planographic prints from George Catlin's North American Indian Portfolio (1844); and ornithological prints from John James Audubon's landmark book The Birds of America (published 1827–38).Examples of work in the collection by other noted expeditionary artists include rare nineteenth-century field studies by Edward Everett (1818–1903), Richard H. Kern (1821–1853), John H. B. Latrobe