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#Mon Aug 09 11:59:10 CEST 2010
Slide__umIVIKOcEd-WfYQ0GneCwQ_title=Can the Principle of Relativity Be Generalized?
Slide__umIVIKOcEd-WfYQ0GneCwQ_footer=On loan from\: Deutsches Museum Munich
Slide__umIVIKOcEd-WfYQ0GneCwQ_subTitle=Einstein to Arnold Sommerfeld, 5 January 1908, reproduction