http://stevenestrella.com/composers/composerfiles/hasse1783.html Biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essays from Dr. Estrella's Incredibly Abridged Dictionary of Composers. http://jan.ucc.nau.edu/~tas3/hasse.html Very brief profile. http://www.britannica.com/eb/article?eu=40293 Brief biography from Britannia.com. http://www.karadar.net/Dictionary/hasse.html Brief profile, partial list of works. http://www.hasseproject.com Featuring music by and information about the German Baroque composer Johann Adolph Hasse.