Mitchell, Robert L.
Engineering economics
John Wiley & Sons, 1980
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Riggs, James L.
Engineering economics
McGraw-Hill, 1982
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Spencer, Milton H.
Contemporary economics
Worth, 1971
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Thuesen, H.G.
Engineering economy
Prentice-Hall, 1971
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A survey of contemporary economics
edited by Howard S. Elllis
Blakiston, 1949
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