National Seminar on Petrochemicals Karachi, Pakistan, & Pakistan Institute of Chemical Engineers. (1981). National Seminar on Petrochemicals, April 12 & 13, 1981, Karachi. The Institute.
Citace podle Chicago (17th ed.)National Seminar on Petrochemicals Karachi, Pakistan, a Pakistan Institute of Chemical Engineers. National Seminar on Petrochemicals, April 12 & 13, 1981, Karachi. Karachi: The Institute, 1981.
Citace podle MLA (8th ed.)National Seminar on Petrochemicals Karachi, Pakistan, a Pakistan Institute of Chemical Engineers. National Seminar on Petrochemicals, April 12 & 13, 1981, Karachi. The Institute, 1981.
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