The Bodleian Library has holdings of over 30,000 ballads in several major collections. The materials range from the 16th- to the 20th-Century. The Broadside Ballads project makes the digitized copies available to the research community.
A virtual library of some 2,000 pieces of sheet music published in California between 1852 and 1900, together with related materials such as a San Francisco publisher's catalog of 1872, programs, songsheets, advertisements, and photographs. Images of every printed page of sheet music have been scanned at 400 dpi, in color where indicated.
"This manuscript is Mozart's record of his compositions in the last seven years of his life, and thus is a uniquely important document. According to the description on the front cover, Mozart planned to include all his compositions, but there are a few minor omissions. Intriguingly, there are also entries in the catalogue for a number of works that have since been lost."