Teeth, language and racial origins, page-1191

I think you might be surprised how many anthropologists have found bartering or systems of exchange that are structured and controlled

Here’s a reference

https://www.journals.uchicago.edu/doi/full/10.1086/377667?mobileUi=0&

I’m pretty sure that if you check out the works of Roger Keesing you will find references to bartering and exchange. He lived among the kwaio and his work is regarded as highly credible.

or his father Felix keesing might help

they are just two I know of