"Morgan Galleries and Other Exhibitions; Art at Home and Abroad," New York Times, June 16, 1918, n.p., illustrated.
"Blashfield's Last Mural," American Art News, vol. 16, no. 35, July 13, 1918, p. 2.
Twenty-Second Report of the National Society of the Daughters of the American Revolution: March 1, 1918, to March 1, 1919, Washington, D.C., 1920, p. 150 (as The Call of Missouri).
Historical Sketch of the Kansas City Public Library, 1911-1936: With Extracts from Annual Reports of Librarian, 1911-1920, Kansas City, Missouri, 1937, p. 52 (as The Call of Missouri).
The Kansas City Star, September 11, 1949, p. 104.
L.N. Amico, The Mural Decorations of Edwin Howland Blashfield, 1848-1936, Williamstown, Massachusetts, 1978, p. 68.
Jersey City Museum, Heroes in the Fight for Beauty: The Muralists of the Hudson County Court House, Jersey City, New Jersey, 1986, p. 94.
L.H. Kavanaugh, "Historical Mural Waits to Be Found," The Kansas City Star, August 5, 2007 (as The Call of Missouri).
M.R. Weiner, ed., Edwin Howland Blashfield: Master American Muralist, New York, 2009, pp. 78, 140, illustrated (as The Call of Missouri (aka Missouri Watching the Departure of her Troops or The Trumpets of Missouri)).
New York, Knoedler Galleries, June 1918.