Analysis of information sources in references of the Wikipedia article "XVe siècle av. J.-C." in French language version.
« But Indian/south Indian history/archaeology has pushed the date back to 1500 B.C., and in Sri Lanka, there are definitely good radiometric dates coming from Anuradhapura that the non-Brahmi symbol-bearing black and red ware occur at least around 900 B.C. or 1000 B.C. »