Barraclough, Geoffrey, 1908-1984. The crucible of Europe : : the ninth and tenth centuries in European history / [electronic resource] / Geoffrey Barraclough.. — Berkeley : : University of California Press,, c1976.. — 180 p. : : ill. ; 25 cm. Includes index. Bibliography: p. 172-174. ISBN: 0520031059 9780520031050 0520031180 (pbk.) 9780520031180 LCCN: 75021934 Subjects--Chronological Terms: Geschichte 800-1000. Subjects--Topical Terms: Middle Ages.Carolingians.Feudalism.Edad Media--Historia.Carolingiens.Féodalité.Moyen Âge--Histoire. Subjects--Geographic Terms: Holy Roman Empire.Europa--Historia--Siglo X.Saint Empire romain germanique.Europa. LC Class. No.: D123 / .B37 1976b Dewey Class. No.: 940.1/4