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<referencetext xmlns="http://eprints.org/ep2/data/2.0">Stone A. The LCSH Century: one hundred years with the Library of Congress Subject Headings. Catalog Classif Q 2000;29(1/2):1-15. 
Bodoff D, Kambil A. Partial coordination. I. The best of pre-coordination and post-coordination. J Am Soc Inform Sci 1998;49(14):1254-69. 
Miller J, Kuhr P. LCSH and periodical indexing: adoption vs. adaptation. Catalog Classifi Q 2000; 29 (1/2):159-68. 
Campbell KE, Oliver DE, Shortliffe EH. The unified medical language system: toward a collaborative approach for solving terminologic problems. JAMIA 1997;5(1):12-6. 
Bodenreider O, Nelson SJ, Hole WT, Chang HF. Beyond synonymy: exploiting the UMLS semantics in mapping vocabularies. JAMIA 1998;815-9. 
Wright LW, Nardini HKG, Aronson AR, Rindflesch TC. Hierarchical concept indexing of full-text documents in the unified medical language system information sources map. J Am Soc Inform Sci 1999;50(6):514-23. 
Cimino JJ. Desiderata for controlled medical vocabularies in the twenty-first century. Methods Inform Med 1998; 37(4-5):394-403. 
Clavel G, Dale P, Heiner-Freiling M, Kunz M, Landry P, MacEwan A, et al. (1999). CoBRA+ working group on multilingual subject access: Final report. http://www.bl.uk/information/finrap3.html. 
Heiner-Freiling M. Survey on subject heading languages used in national libraries and bibliographies. Catalog Classif Q 2000; 29 (1/2):189-198. 
Chan LM. Still Robust at 100: a century of LC subject headings. Libr Congr Inform Bull 1998;57(8):200-1. 
Quijano Solís A, Moreno Jiménez PM, Figueroa Servin R. Automated authority files of Spanish language headings. Catalog Classif Q 2000; 29 (1/2):209-23. 
Lopes MI. Principles underlying subject heading languages: an international approach. Int Catalog Bibliogr Control 1996;25(1):10-2. 
Holley RP, ed. Subject indexing: principles and practices in the 90’s. Munich: K.G.Sauer, 1995. (UBCIM Publications-New series vol. 15). 
Lopes MI, Julianne BJ eds. Principles underlying subject heading languages (SHLs). Munich: K.G.Sauer, 1999. (UBCIM Publications-New series; vol. 21). 
Hoerman HL, Furniss KA. Turning practice into principles: a comparison of the IFLA principles underlying subject heading languages (SHLs) and the principles underlying the Library of Congress Subject Headings System. Catalog and Classif Q 2000; 29 (1/2):31-52. 
Chan LM. Library of Congress Subject Headings: principles of structure and policies for applications. Annotated version. Washington, D.C.: Library of Congress, 1990.</referencetext>
