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	1.		On-LIne information retrieval systems: An introductory manual to principles and practice by Houghton, Bernard Convey, John Material type: Text; Format: print ; Literary form: Not fiction Publication details: London: Clive Bingley Ltd., 1977 Availability: Items available for loan: National Science Library (1)Call number: D 002:681.3.022 L7. Place hold Add to cart (remove)
	2.		Online information retrieval systems: An introductory manual to principles and practice by Houghton, Bernard Convey, John Edition: 2nd ed. Material type: Text; Format: print ; Literary form: Not fiction Publication details: London: Clive Bingley, 1935 Availability: Items available for loan: National Science Library (1)Call number: D 681.3 M4. Place hold Add to cart (remove)
	3.		Spectrum of steel: A table for the selection of homologous spectral lines by Convey, John Material type: Text; Format: print ; Literary form: Not fiction Publication details: Ottawa: Department of Mines and Technical Surveys, Availability: Items available for loan: National Science Library (2)Call number: 535.33:669.14(083) K5;1, ... Place hold Add to cart (remove)
	4.		Spectrum of steel: A table for the selection of homologous spectral lines by Convey, John Hurwitz, J K Material type: Text; Format: print ; Literary form: Not fiction Publication details: Ottawa: Department of Mines and Technical Surveys, Availability: Items available for reference: National Science Library: Not for loan (1)Call number: 669.14. Add to cart (remove)