Who's Who in the Socialist Countries of Europe A Biographical Encyclopedia of More Than 12,600 Leading Personalities in Albania, Bulgaria, Czechoslov 通过 Juliusz Stroynowski Hardcover, 1,367 页, 发布时间 1989 通过 K G Saur Verlag Gmbh & Co ISBN-13: 978-3-598-10636-1, ISBN: 3-598-10636-X
The Imperial City of Cologne From Roman Colony to Medieval Metropolis (19 B.C.-1125 A.D.) (The Early Medieval North Atlantic) 通过 Prof. Joseph Huffman Hardcover, 280 页, 发布时间 2018 通过 Amsterdam University Press ISBN-13: 978-94-6298-822-4, ISBN: 94-6298-822-6