SHEET MUSIC
Check out the following sites for old sheet music
Duke Sheet Music Collections
http://www.lib.duke.edu/music/sheetmusic/
The Lester S. Levy Collection of Sheet Music - Keyword Search
http://levysheetmusic.mse.jhu.edu/
UNC-Chapel Hill Music Library 19th Century American Sheet Music
Historic American Sheet Music
http://scriptorium.lib.duke.edu/sheetmusic/
SHEET MUSIC CENTER
FOR COLLECTOR'S OF VINTAGE POPULAR SHEET MUSIC
http://www.sheetmusiccenter.com/
Downloadable original sheet music covers and lyric/music pages.
Lester Levy Sheet Music Collection at John Hopkins University is
http://levysheetmusic.mse.jhu.edu
Duke University
http://scriptorium.lib.duke.edu:80/sheetmusic/