History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c13.s2.t12.5
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c13.s2.t12.5
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v1.c13.s2.t12.5
(iv) Vajra - 1000 times better than Bhadra iron.