See Peter J. Parr et al., “Preliminary Survey in N.W. Arabia, 1968,” Bulletin of the Institute of Archaeology 8–9: 1968–1969 (1970), pp. 193–242; 10 (1972), pp. 23–61; Parr, “Contacts Between Northwest Arabia and Jordan in the Late Bronze and Iron Ages,” Studies in the History and Archaeology of Jordan, ed. A. Hadidi (Amman: Department of Antiquities, 1982), pp. 127–134; M.L. Ingraham, T.J. Johnson, B. Rihani and I. Shatla, “Saudi Arabian Comprehensive Survey Program: Preliminary Report on a Reconnaissance Survey of me Northwestern Province,” Atlal 5 (1981), pp. 59–84.