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Dyfyniad Arddull ChicagoLall G.S and S. Prabhu Ramachandran. Finance of Foreign Trade and Foreign Exchange. H.P.J. Kapoor: New Delhi, 1968.
Dyfyniad MLALall G.S and S. Prabhu Ramachandran. Finance of Foreign Trade and Foreign Exchange. New Delhi, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.