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Dyfyniad Arddull ChicagoD N Basu and Raghu Roy. Impact of Agricultural Development on Demographic Behaviour. Abhinav, 1979.
Dyfyniad MLAD N Basu and Raghu Roy. Impact of Agricultural Development on Demographic Behaviour. Abhinav, 1979.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.