Kolodko, Julian, author
Institution of Engineering and Technology, 2005
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McConnell, James, author
Academic Press, 1980
Buku Teks
Mundel, Marvin E
Prentice-Hall, 1955
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Barnes, Ralph M. (Ralph Mosser), author
John Wiley & Sons, 1949
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Nadler, Gerald
McGraw-Hill Book , 1955
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