The following rules for subject headings were evolved in the library of the Royal Institute of British Architects over a period of about three years while the index to articles in periodicals was being completely overhauled and expanded.
THOMPSON, A. (1953), "RULES FOR SUBJECT HEADINGS, PERIODICALS SUBJECT INDEX, ROYAL INSTITUTE OF BRITISH ARCHITECTS LIBRARY", Journal of Documentation, Vol. 9 No. 3, pp. 171-174. https://doi.org/10.1108/eb026195
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