The Washington Post
The Washington Post: "The History of Jazz," Chapter 1
This site offers the first chapter of Ted Gioia's book, "The History of Jazz." This chapter focuses on the prehistory of jazz, including the Africanization of American music, country blues and classic blues, and Scott Joplin and Ragtime.
Other
The Official George Crumb Home Page
The official site, with sections devoted to his life, compositions, recordings, writings, and news. The news section has internet links, and the site has a search function!