The following are websites that were referenced while researching this blog.
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=46767209
http://en.wikipedia.org/wiki/Emil_Rathenau
http://museumofmagneticsoundrecording.org/ManufacturersAEGMagnetophon.html#
http://www.fsmitha.com/h3/h36-6.html
http://www.gauravhira.freehomepage.com/germany.htm
http://jewishhistory.org.il/history.php?startyear=1880&endyear=1889