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India : a short cultural history
Rawlinson, H. G., (1937)
Social and cultural history of Kerala
Sreedhara Menon, A., (1979)
The early history of Kaliṅga : ( a socioeconomic and cultural history of coastal Orissa)
Das, Dharmanarayan, (1977)
Madhya Pradesh
Bajpai, Krishna D., (1985)