19th Century American Sheet Music Digitization Project [UNC];19th-Century California Sheet Music [UCB]by Mary Kay Duggan;African-American Sheet Music, 1850-1920: Selected from the Collections of Brown University [LC-Brown];Charles H. Templeton Sheet Music Collection [MSU];Florida Sheet Music Collection [USF];Historic American Sheet Music [Duke];Historic American Sheet Music, 1850-1920: Selected from the Collections of Duke University [LC-Duke];Inventions of Note Sheet Music Collection [MIT];Keffer Collection of Sheet Music, ca. 1790-1895 [Penn]. "Focus on Philadelphia"by John Bewley;Music for the Nation: American Sheet Music, 1870-1885 [LC-Nation];Lester S. Levy Collection of Sheet Music [JHU];[Music portion of] Performing Arts in America, 1875-1923 [NYPL];Popular American Music Digital Archive [UCLA];Sam DeVincent Collection of Illustrated American Sheet Music, ca. 1790-1980 [SI];"We'll Sing to Abe Our Song!": Sheet Music about Lincoln, Emancipation, and the Civil War, from the Alfred Whital Stern Collection of Lincolniana [LC-Lincoln]