Silman, A. J. (2002). Epidemiological studies: A practical guide. Cambridge,New York: Cambridge University Press.
Dyfyniad Arddull ChicagoSilman, Alan J. Epidemiological Studies: A Practical Guide. Cambridge,New York: Cambridge University Press, 2002.
Dyfyniad MLASilman, Alan J. Epidemiological Studies: A Practical Guide. Cambridge,New York: Cambridge University Press, 2002.
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