Roman Officers and Frontiers. By David J. Breeze and Brian Dobson. Mavors Roman Army Researches 10. Steiner, Stuttgart, 1993. Pp.631. DM 288. ISBN 3 515 06181 9. - Bauten und Katapulte des
Ludgar, der Wolf des Krieges - DER SPIEGEL
Greek and Roman Artillery 399 BC–AD 363 (New Vanguard): Campbell, Duncan B, Delf, Brian: 9781841766348: Books