From 1963 to 1967, he was a Subject Editor at the " British National Bibliography ".
2.
He was also a developer of innovative British National Bibliography . " His aim was to create an indexing system that would liberate indexers from the constraints of'relative significance'( main entries ) . . . . As by-products of his indexing theories he worked out drafts that in the mid-1980s were accepted as British and International Standards for examining documents, and for establishing multilingual and monolingual thesauri ".
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