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Dyfyniad Arddull ChicagoWorld Health Organization, Geneva. Environmental Health Criteria 88: Polychlorinated Dibenzo-para-dioxins and Dibenzofurans: IPCS International Programme on Chemical Safety. Geneva: World Health Organization, 1989.
Dyfyniad MLAWorld Health Organization, Geneva. Environmental Health Criteria 88: Polychlorinated Dibenzo-para-dioxins and Dibenzofurans: IPCS International Programme on Chemical Safety. World Health Organization, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.