The Roman Frontier in Central Jordan: Final Report on the Limes Arabicus Project, 1980-1989. By S. Thomas Parker, John Wilson Betlyon, Robin M. Brown, Vincent A. Clark, Patricia Crawford, Bert de Vries, Victoria L. Godwin, Jennifer C. Groot, Janet Duncan Jones, Jennifer E. Jones, Frank L. Kouchy, Andrea Lain, Eric C. Lapp, Joann McDaniel, Robert Schick, and Michael R. Toplyn.