DIFFUSION OF CULTURE
This was published in 1923 to indicate the diffusion of culture before 1500 B.C.
B and P. The lines of diffusion form Elam (E) to India.
BR. The probable home of bronze.
T. Anau in Turkestan.
H. The Megalithic Area in Southern India.
Co. Colchis, the Megalithic Area in the Caucasus.
From Human History by G. Elliot Smith