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Seminar nasional teknologi industri III - ITS 1987 : Proceedings 3. (Surabaya : ITS, 1987). Surabaya : ITS, 1987: Surabaya : ITS, 1987.

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Seminar nasional teknologi industri III - ITS 1987 : Proceedings 3. . Surabaya : ITS, 1987: Surabaya : ITS, 1987, Surabaya : ITS, 1987. Text.