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Tampubolon, H. W.. (0). Operations research (cet.1). Jakarta: FE Universitas Kristen Indonesia.

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Tampubolon, H. W.. Operations research. cet.1 Jakarta: FE Universitas Kristen Indonesia, 0. Text.

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Tampubolon, H. W.. Operations research. cet.1 Jakarta: FE Universitas Kristen Indonesia, 0. Text.

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Tampubolon, H. W.. Operations research. cet.1 Jakarta: FE Universitas Kristen Indonesia, 0. Print.