Tibet, Zhang Zhung civilization
The Dawn of Tibet: the Ancient Civilization on the Roof of the World by John Vincent Bellezza is a unique work by an intrepid explorer-scholar who, purely from his own inspiration, spent decades doggedly tracking down traces of the prehistoric Zhang Zhung civilization, a Metal Age culture (famed for making iron weapons of war) and a polity that dominated the remote northwestern plateau of Upper Tibet until the 7th century CE.
"John Vincent Bellezza. The Dawn of Tibet: The Ancient Civilization on the Roof of the World,"
Comparative Civilizations Review: Vol. 83
, Article 22.
Available at: https://scholarsarchive.byu.edu/ccr/vol83/iss83/22