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Barro, Robert J., author
McGraw-Hill, 1995
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Fakultas Kedokteran Gigi Universitas Trisakti, 2011
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Williamson, Harold F., author
Prentice-Hall, 1951
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Duesenberry, James S. (James Stemble), 1918-2009, author
McGraw-Hill, 1958
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