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Dyfyniad Arddull ChicagoGill, Khem Singh. A Growing Agricultural Economy: Technological Changes, Constraints and Sustainability. New Delhi: Oxford, 1993.
Dyfyniad MLAGill, Khem Singh. A Growing Agricultural Economy: Technological Changes, Constraints and Sustainability. Oxford, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.