Ferguson, C. E., author
Principles of economics
Holt, Rinehart and Winston, 1962
 Buku Teks
Ferguson, C. E., author
Principles of economics
Holt, Rinehart and Winston, 1965
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Case, Karl E., author
Principles of economics
Pearson, 2017
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Fairchild, Fred Rogers, author
Principles of economics
Macmillan, 1954
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Case, Karl E., author
Principles of economics
Prentice-Hall, 1992
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