Stewart, R. G., & Herring, J. (1969). A nineteenth-century gallery of distinguished Americans. Washington: Published for the National Portrait Gallery by Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Stewart, Robert G., and James Herring. A Nineteenth-century Gallery of Distinguished Americans. Washington: Published for the National Portrait Gallery by Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1969.

Stewart, Robert G., and James Herring. A Nineteenth-century Gallery of Distinguished Americans. Washington: Published for the National Portrait Gallery by Smithsonian Institution Press; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1969.