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Dyfyniad Arddull ChicagoVyas,Jay Narayan. Import of Capital Goods and Raw Materials. Ahmedabad: N K Vyas Publishers, 1985.
Dyfyniad MLAVyas,Jay Narayan. Import of Capital Goods and Raw Materials. N K Vyas Publishers, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.