GUPTA, O. P. (1996). CHEMICAL ENGINEERING. KHANNA PUB.
Chicago-čujuhus (17. p.)GUPTA, OM PRAKASH. CHEMICAL ENGINEERING. AURANGABAD: KHANNA PUB, 1996.
MLA-čujuhus (9. p.)GUPTA, OM PRAKASH. CHEMICAL ENGINEERING. KHANNA PUB, 1996.
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