Biswas, A. K., & Sulekha, B. (1994). Minerals and metals in Ancient India. D.K. Printworld.
Dyfyniad Arddull ChicagoBiswas, Arun Kumar, and Biswas Sulekha. Minerals and Metals in Ancient India. New Delhi: D.K. Printworld, 1994.
Dyfyniad MLABiswas, Arun Kumar, and Biswas Sulekha. Minerals and Metals in Ancient India. D.K. Printworld, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.