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Raymond Nacenta, School of Paris: the painters and the artistic climate of Paris since 1910. Greenwich CT: New York Graphic Society, 1960, page 284—
[Marc] Chagall returned to Russia in 1914, where he was married to Bella, whose love is celebrated in so many of his paintings. He served in a camouflage unit during the war and, after the Revolution, was for a time Commissar for the Fine Arts in Vitebsk.
