Oman Charles Sir The Dark ages: 476-918. / Ch. Oman - 13th impression. 6th edition. - London: Rivingtons, 1959. - X+532 p.; maps, tables; 19 cm. - Periods of European History , Period I . Bibl. note - p.: IX-X; Appendix - p.: 515-517; Index - p.: 519-532. Subjects--Topical Terms: European History--5-10th centuriesHistory--Europe