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Dyfyniad Arddull ChicagoCoventry, Alexander. "On the Contagious Nature of the Yellow Fever." Edinb Med Surg J 1822.
Dyfyniad MLACoventry, Alexander. "On the Contagious Nature of the Yellow Fever." Edinb Med Surg J 1822.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.