Wakeford, Richard E.
World Health Organization, 1974
Buku Teks
Abbatt, Fred
Macmillan, 1988
Buku Teks
Youngkin, Ellis Quinn
Appleton & Lange , 1998
Buku Teks
McMahon, Rosemary
World Health Organization, 1992
Buku Teks
Shoske, Daniel A., editor
Springer, 2012
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