Ketchum, Paul A.
Microbiology : introduction for health professionals
John Wiley & Sons, 1984
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Introduction to health services
editors, Stephen J. Williams, Paul R. Torrens
Delmar , 1998
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McKenzie, James F.
An introduction to community health
Jones and Bartlett, 2005
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Wilner, Daniel M.
Introduction to public health
Macmillan, 1973
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Greene, Walter H.
Introduction to health education
Waveland Press, 1984
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