Stockton, John R.
Introduction to business and economic statistics
South Western, 1966
 Buku Teks
Robinson, Marshall A.
An introduction to economic reasoning
Brookings Institution, 1962
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Robinson, Marshall A.
An introduction to economic reasoning
Brookings Institution, 1962
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Leftwich, Richard H.
An introduction to economic thinking
Rienhard and Winston, 1969
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Holden, K.
Economic forecasting: an introduction
Cambridge University Press, 1990
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