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Dyfyniad Arddull ChicagoSmith, Richard D. Global Public Goods for Health: Health Economic and Public Health Perspectives. Oxford: Oxford University Press, 2003.
Dyfyniad MLASmith, Richard D. Global Public Goods for Health: Health Economic and Public Health Perspectives. Oxford University Press, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.