Raja Ram Mohun Roy (1772-1833). "Hindu Authorities in Favour of Slaying the Cow and Eating its Flesh" (cited in Jha's Myth of Holy Cow, p.24)

Beef eating: strangulating history by Prof. RAM PUNIYANI, The Hindu, August 14, 2001

A Brahmin's Cow Tales – History of Beef Eating in India by Hindus by Sheelareddy (on Scribd)

Beef-Eating in Ancient India by Mahadev Chakravarti, Social ScientistVol. 7, No. 11 (Jun., 1979), pp. 51-55 ,

Beef, BJP and Food Rights of People, Kancha Ilaiah, Economic and Political WeeklyVol. 31, No. 24 (Jun. 15, 1996), pp. 1444-1445,
A Case of Anomalous Values in Indian Civilization: Meat-Eating Among the Kanya-Kubja Brahmans of Katyayan Gotra, R. S. Khare, The Journal of Asian StudiesVol. 25, No. 2 (Feb., 1966), pp. 229-240,
even the staunchly Hindu nationalist writer, K. M. Munshi, had once noted, without a trace of embarrassment, that "in spite of Jainism and Buddhism, fish and meat, not excluding beef, were consumed extensively by the people."  [Source]

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