"The archaeological correlates become some sort of labels or tags that one may employ in order to trace the supposed Indo-European populations. But, in fact, very little of the illustrative archaeological material actually exhibits specific Indo-European or Indo-Iranian traits; a question therefore arises: what is the relevance of archaeological material if any sort of assemblage present at the expected or supposed time/space spot can function as the tag of a linguistic group?"
January 1, 1970
https://en.wikiquote.org/wiki/Indo-European_migrations