David Alon and Thomas E. Levy, “Preliminary Note on the Distribution of Chalcolithic Sites on the Wadi Beersheva and Lower Wadi Besor Drainage System,” Israel Exploratzon Journal 30 (1980) pp. 140–147; Levy and Alon, “Chalcolithic Settlement Patterns in the Northem Negev Desert,” Current Anthropology 24 (1983), pp. 105–107.