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Zia, L.L.: new projects and a progress report : ¬The NSF National Science, Technology, Engineering, and Mathematics Education Digital Library (NSDL) program (2001)
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He, B.; Ounis, I.: Combining fields for query expansion and adaptive query expansion (2007)
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Torres-Salinas, D.; Gorraiz, J.; Robinson-Garcia, N.: ¬The insoluble problems of books : what does Altmetric.com have to offer? (2018)
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