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The basic rules of classification are
- Each characteristic of division must produce at least two classes
- Only one principle of division must be used at a time, to produce mutually exclusive classes.
- The species of any genius must be completely exhaustive of their parent class.

— Brian Campbell Vickery Classification and indexing in science (1958)

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More quotes by Brian Campbell Vickery

Citation does not necessarily reflect current demand.

Penelope Earle and Brian Campbell Vickery (1969)

The job of our profession is to facilitate the provision of knowledge (in all forms) to those who need it (for whatever purpose).

Information history – an introduction (2009)

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.

On Retrieval System Theory (1961)

Information science is concerned with every aspect of the chain of information transfer activities, but the heart of its interest is information search.

B.C. Vickery (1997)

It is with this whole cycle [between generation and use of information] that information science is now concerned.

Information Science in Theory and Practice (1987)

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Quote text and notes from Wikiquote: Brian Campbell Vickery (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.