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Dyfyniad Arddull ChicagoKrishna Rao,Y V. Technology and Social Change in Agriculture. New Delhi: Peoples, 1993.
Dyfyniad MLAKrishna Rao,Y V. Technology and Social Change in Agriculture. Peoples, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.