http://bubl.ac.uk/link/t/twentiethcenturymusic.htm Eighteen resources on twentieth century music with abstracts. http://www.ucc.ie/ucc/depts/music/online/e20comps.html Links to sites devoted to composers of the period. http://www.ipl.org/exhibit/mushist/twen/index.htm Composers, major styles and developments, illustrations, and Real Audio RAM sound files. http://hem.passagen.se/alkerstj/worldofclassicalmusic/early20th/early_twentieth_century.html Commentary on societal changes and the effects they had on the music of the period. Includes links to noted composers of the time.