"We will notice that the traces attested today stop in Bactria... No Andronovian burial has yet been found south of the Oxus.... It should therefore be assumed that the Indo-Iranians, Proto-Iranians or Proto-Indo-Aryans got rid of this culture just as they entered Iran and India. The hypothesis is possible since, to arrive in these territories, they had necessarily crossed sedentary zones belonging to the Oxus civilization, whose material culture was much superior. The curious thing is that they seem not to have borrowed anything from the latter either... Clearly, it is very difficult to find a marker for the Indo-Iranian group."