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Dyfyniad Arddull ChicagoSkirrow, M. B. A Demographic Survey of Campylobacter, Salmonella and Shigella Infections in England. A Public Health Laboratory Service Survey. Cambridge University Press, 1987.
Dyfyniad MLASkirrow, M. B. A Demographic Survey of Campylobacter, Salmonella and Shigella Infections in England. A Public Health Laboratory Service Survey. Cambridge University Press, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.