Sheet Music Collections Online
19th Century Sheet Music Covers from Brown University's John Hay Library.
19th CenturyCalifornia Sheet Music courtesy of Mary Kay Duggan at UC Berkeley.
University of Colorado's Digital Sheet Music Collection
Digital Collections at the Library of Congress: Music for the Nation:Music for the Nation: American Sheet Music, 1820-1860 & 1870-1885; American Singing: Nineteenth-Century Song Sheets; Historic American Sheet Music 1850-1920 from Duke University, and African American Sheet Music 1850-1920 from Brown University.
Historic American Sheet Music from Duke University
Motto sheet music collection at the Fayetteville [N.Y.] Free Library (35,000+ items)
Images of Hawaii on sheet music at hulapages.com
List of sheet music collections at Indiana University's Lilly Library
The Lester S. Levy Sheet Music Collection at Johns Hopkins University
Finding aid for the Donald MacLaren Simmons Sheet Music Collection at Kent State University Library
Templeton Sheet Music Collection at Mississippi State University
Sheet Music from New York Public Library's Digital Gallery.
19th century American Sheet Music from the University of North Carolina at Chapel Hill.
Sheet music covers from the Tennessee State Library & Archives' Tennessee Virtual Archive
California sheet music from UC Berkeley.
Florida Sheet Music Collection at the University of South Florida.
Sheet Music Collections about Oregon and Women Composers at the University of Oregon Libraries
Selected sheet music covers from Tom Morgan's personal collection.
Locating Lyrics, SheetMusic, Librettos, and Scores from the Digital Librarian site.
Sites about antique recording formats
Cylinder Preservation and Digitization Project from the Davidson Library, UC-Santa Barbara
Tinfoil.com:Early Recorded Sounds and Wax Cylinders
Links to phonograph related sites and organizations courtesy of The Old Crank Site
Inventing Entertainment: The Motion Pictures and Sound Recordings of the Edison Companies from the Library of Congress