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O.P. Gupta

O.P. Gupta

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    Khanna’s Interview Questions & Answers in Chemical Engineering

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    Elements of Fertilizer Technology

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    Elements of Polymer Science and Technology

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    Elements of Petroleum Refinery Engineering

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    Elements of Environmental Pollution Control

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    Khanna’s Multi-Choice Questions and Answers in Chemical Engineering

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  • -25% Khanna's Multi-Choice Questions & Answers in Environmental Engineering

    Khanna’s Multi-Choice Questions & Answers in Environmental Engineering

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    Energy Technology

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