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Dyfyniad Arddull ChicagoSinha, B.N. Industrial Geography of India: B.N.Sinha. Calcutta: World Press, 1972.
Dyfyniad MLASinha, B.N. Industrial Geography of India: B.N.Sinha. World Press, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.