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	1.	No cover image available Information systems for promotion & utilization of technology by Yapa, N.U Ranasinghe, W Language: Publication details: NARESA Colombo ; 1988 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)
	2.	No cover image available Scientific & Technical Information Services in Sri Lanka (an Overview) by Yapa, N.U Language: Publication details: NARESA Colombo ; 1986 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)
	3.	No cover image available CDS/ISIS sarala ath potha by Yapa, N.U Language: Publication details: NARESA Colombo ; 1996 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)
	4.	No cover image available Purna integrated information system for library operations User manual by Yapa, N.U NARESA Language: Publication details: NARESA Colombo ; 1997 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)

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