New York University
Music Literature: The Classical Period
Resource provides information on the Classical Period in music by discussing the three main composers most notably associated with that period: Haydn, Beethoven, and Mozart.
Northern Arizona University
Northern Arizona Univ.: Symmetrical Binary Principle
This site from the Northern Arizona University contains the meanings of the symmetrical binary principle in Bach's music and several other composers of this period.
Classical Net
Classical Net: Hugo Wolf
Classical Net provides a brief list of songs by composer, Hugo Wolf, and also includes an image.
ibiblio
Ibiblio: Amy Beach
Short biography of Amy Marcy Cheney Beach, including information on her life and works.