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Dyfyniad Arddull ChicagoDavey, Sheila. The 10/90 Report on Health Research, 2001-2002. Geneva: World Health Organization, 2002.
Dyfyniad MLADavey, Sheila. The 10/90 Report on Health Research, 2001-2002. World Health Organization, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.