http://imslp.org/wiki/Category:Beyer,_Ferdinand
http://store.musicbasics.com/beyerferdinand.html
_ Ferdinand Beyer : The Star Spangled Banner Op.93
http://www.youtube.com/watch?v=oTC-oD7swdI
_ BEYER No. 81, Escuela preparatoria de Piano op. 101
http://www.youtube.com/watch?v=LS4yyPu8XV8