The preface to the first edition of this book... shows that in 1958 the classification ideas in it were felt to controversial, needing to be championed. A few years before, the Classification Research Group had issued a memorandum proclaiming the need for a faceted classification as the basis of all methods of information retrieval'. As part-author of this memorandum, I must now judge the claim to have been too bold, even brash.

Preface to third edition; Partly cited in: Vanda Broughton (2011) "Brian Vickery and the Classification Research Group: the legacy of faceted classification" p. 6 - Classification and indexing in science (1958)