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Dyfyniad Arddull ChicagoWorld Health Organization. Who Commission on Health and Environment: Report of the Panel on Energy. Geneva: World Health Oraganization, 1992.
Dyfyniad MLAWorld Health Organization. Who Commission on Health and Environment: Report of the Panel on Energy. World Health Oraganization, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.