Combs, Cindy C. Terrorism in the twenty-first century / - 4th ed. - Upper Saddle River, N.J. : Pearson/Prentice Hall, c2006. - xii, 334 pages : Illustrations ; Incudes index. ISBN: 013193063X Subjects--Topical Terms: Terrorism.Terrorism - forecasting. LC Class. No.: HV 6431 / COM