Brian Campbell Vickery Quote
History presents a series of cultural epochs. Each is a span of years within which knowledge presents a more or less unified structure which can be expressed in a classification, but each new epoch requires a new classification.
P. 147 Cited in: Madeline M. Henderson (1966) Cooperation, convertibility, and compatibility among information systems: a literature review. p. 72. - Classification and indexing in science (1958)