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Dyfyniad Arddull ChicagoSheng, Zong-Mei, et al. Autopsy Series of 68 Cases Dying Before and During the 1918 Influenza Pandemic Peak. National Academy of Sciences, 2011.
Dyfyniad MLASheng, Zong-Mei, et al. Autopsy Series of 68 Cases Dying Before and During the 1918 Influenza Pandemic Peak. National Academy of Sciences, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.