http://nla.gov.au/nla.mus-an6304057
http://en.wikipedia.org/wiki/Ferdinand_Beyer
http://store.musicbasics.com/beyerferdinand.html
_ Ferdinand Beyer No.38
http://www.youtube.com/watch?v=jTfyHJTRaIw
_ Etude No. 77 (Beyer)
http://www.youtube.com/watch?v=cCjRwBw9q1s