Anthony Philip Heinrich Classical Composers Database entry with positive evaluations of his work. http://users.knoware.nl/~jsmeets/cgi-bin/ccd.cgi?comp=heinrich

Heinrich, Anthony Philip Kallisti Music Press article includes biography, MIDI audio files, and works list with purchase information. http://pw1.netcom.com/~kallisti/Heinrich.html

Heinrich, Papa King College Romanticism in Music class project with biography, list of compositions, critical analysis, discography, and bibliography. http://www.king.edu/MusicResearch/Heinrich/

James Hook Miscellaneous songs from recmusic.org with lyrics. http://www.recmusic.org/lieder/h/hook.html