Situation in eastern Iran, and spreading up the Helmand River into Afghanistan, are the ruins of dozens of archaeological sites. This is the lost Helmand Civilization Excavations at Shahr-i Sokhta: First Preliminary Report on the Excvations of the Graveyard, 1997 - 2000, Sajjadi et al The Archaeology of Afghanistan: From Earliest Times to the Timurid Period, Ball et al Italy vi. Italian Excavations in Iran, Callieri et al, Encyclopedia Iranica