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Brian Campbell Vickery - There is as yet no unified...
There is as yet no unified theory of retrieval systems, and a good deal of retrieval practice is still an empirical art, unsullied by theory. (Brian Campbell Vickery)

There is as yet no unified theory of retrieval systems, and a good deal of retrieval practice is still an empirical art, unsullied by theory.

Brian Campbell Vickery

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art deal good practice retrieval theory yet

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