found: Guerre des états ou guerre des classes, 1924:t.p. (Edouard Berth)
found: OCLC, July 13, 2004(hdg.: Berth, Edouard, d. 1939; usage: Edouard Berth)
found: La France au milieu du monde, ©2014:t.p. (Eduoard Berth) back cover (1875-1939; pupil of Sorel) p. 61 (Berth, Camille, known as Éduoard; Jeumont, 1875; Neuilly, 1939)
found: Wikipedia, viewed Aug. 10, 2017:(Édouard Berth (1875-1939) was a theorist of French syndicalism and disciple of Georges Sorel. Berth tried to unify the metaphysics of Marx and Bergson through his articulation of revolutionary self-organization of the proletariat)
