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Orton, D.: Database review : engineering (1995)
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Regazzi, J.J.: User driven : the evolution of the Ei Reference Desk (1992)
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Mejer, J.J.; Conkling, T.W.: Google Scholar's coverage of the engineering literature : an empirical study (2008)
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Kostoff, R.N.; Eberhart, H.J.; Toothman, D.R.: Database tomography for information retrieval (1997)
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Day, S.: SIGLE on CD-ROM (1992)
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