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	1.		Petroleum refinery engineering by Nelson, W L Series: Chemical engineering series Material type: Text; Format: print ; Literary form: Not fiction Publication details: New York: McGraw-Hill Book Company, Inc., 1949 Availability: Items available for reference: National Science Library: Not for loan (1)Call number: 665.5 H9. Add to cart (remove)
	2.		Guide to new natural gas utilization technologies by Hay, Nelson E (Ed.) Material type: Text; Format: print ; Literary form: Not fiction Publication details: Georgia: The Fairmont Press, 1985 Availability: Items available for reference: National Science Library: Not for loan (1)Call number: R 662.76(026) M5. Add to cart (remove)

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