IntestazioneWalker, Georg Usata in: Integrated Authority File (GND), Germany
Fonti esterne
Fonti a stampaAnweisung zum Schachspielen
English chess masters of the 19th century William Lewis, George Walker and Augustus Mongredien. [Unknown authorUnknown author / http://www.edochess.ca/batgirl/Mongredien.html -- Public domain -- http://commons.wikimedia.org/wiki/File:LewisWalkerMongredien.jpg]