Proceedings of the Annual Convention // Indonesian Petroleum Association ; 7

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Proceedings of the Fifth Annual Convention

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Proceedings of the Fifteenth Annual Convention

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Proceedings of the Annual Convention - Indonesian Petroleum Association

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Proceedings of the Twelfth Annual Convention

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Proceedings of the Seventh Annual Convention, Jakarta, June 6-7, 1978

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Proceedings of the Fifteenth Annual Convention, Jakarta, October 7-9, 1986

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Proceedings of the Twenty-seventh Annual Convention

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Proceedings of the Annual Convention // Indonesian Petroleum Association ; 6

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Proceedings of the Annual Convention // Indonesian Petroleum Association ; 15

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