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