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	1.	No cover image available National Engineering Research and Development Centre of Sri Lanka Twenty fifth anniversary( Souvenir) Publication details: NERD Ja-Ela 1999 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)
	2.	Great scientific inventions Language: English Publication details: Learners press private limited New Delhi 1999 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)
	3.	No cover image available Mahaweli statistical handbook1999 Publication details: Mahaweli Authority 1999 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)
	4.	Analysis of unique natural ,environmental and cultural assets threatened by infrastructure projects:the case of uper Kotmale Hydropower project by Ranasinghe, M Series: Research Studies:Energy & Environmental Economic Series ; No.8 Language: Publication details: Institute of Policy Studies Colombo 1999 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)
	5.	No cover image available NASA's earth science enterprise:version 3 Language: Publication details: NASA ; 1999 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)
	6.	The advanced internet searcher's handbook by Bradley, P Edition: 3rd Language: English Publication details: Facet Publishing London 1999 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)
	7.	No cover image available The importance of national archives as an information center for Historical Research Souvenir to mark the national archives week-1999 by Wimalaratne,K.D.G Department of National Archives Publication details: Department of National Archives Colombo ; 1999 Availability: Items available for reference: National Science Library & Resource Center: Staff collection (1). Add to cart (remove)

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