Alley, Rewi, 1897-1987
By the author, 1954
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Jurnal Teknologi, 15 (2) Juni 2001 : 134-146 , 2001
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Chrispeels, Maarten J.
"San Francisco: W.H Freeman and Co., 1977",
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Katcher, Bruce Leslie
American Management Association, 2007
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