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Barker, A.L.: Non-Boolean searching on commercial online systems : optimising use of Dialog TARGET and ESA/IRS QUESTQUORUM (1995)
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- Online information 95: Proceedings of the 19th International online information meeting, London, 5-7 December 1995. Ed.: D.I. Raitt u. B. Jeapes
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Barker, A.L.: DataStar Web : a comparison with 'classic' DataStar command language searching (1998)
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- Online and CD-ROM review. 22(1998) no.3, S.155-167