Doctoral dissertation karl marx
{"Image ImageDescription": "UNSPECIFIED - CIRCA 1865:  Karl Marx (1818-1883), philosopher and German politician.  (Photo by Roger Viollet Collection/Getty Images)", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Artist": "Roger Viollet Collection", "Image YCbCrPositioning": "Centered", "Image Copyright": "Roger Viollet Collection"}