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Dyfyniad Arddull ChicagoHill, Allan G. Determinants of Health and Mortality in Africa. New York: Population Council, 1990.
Dyfyniad MLAHill, Allan G. Determinants of Health and Mortality in Africa. Population Council, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.