UBA. Sistema de Bibliotecas y de información. Bibliotecas universitarias: formato co- mún para registro de información docu- mental. Buenos Aires: UBA, 1993. UNAM. Catálogo de autoridades de la Univer- sidad Nacional Autónoma de México. México DF: CUlB, UNAM, 1997. Vega E. Macros en la impresión de fichas catalográficas. En: lll Jornadas Naciona- les sobre Microisis: Mar del Plata, 24, 25 y 26 de noviembre de 1993. Mar del Plata: Universidad Nacional de Mar del Plata, 1993:5562. Vickery B, Vickery A. Online search interface design. Joumal of documentation 1993; 49(2): 103-87. Vizine-Goetz D, Markey K. Characteristics of subject heading records in the machine- readable Library of Congress subject headings. lnfonnation technology and libraries 1989; 8:203-9 . Walker S. OKAPI: evaluating and enhancing an experimental online catalog. Library trenck: 1987; 35(4):63l—45. 4):2l3—34. 76 information retrieval thesauri: comparison and contrast. Cataloging and classification qJarterly 1995; l9(3/ 4): 23- 44. Willlamson NJ. Classification in the computer age. Intematlonal classiscation 1989a; l6(l):30-4. Williamson NJ. The role of classification in online systems. Cataloging and classification quarterly l989b; 10(2):95- 104. Williamson NJ. The Library of Congress classification: a content analysis of the schedules in preparation for their conversion into machine readable form. Washington DC: Library of Congress, 1994. Williamson NJ. Deriving a thesaurus from a restructured UDC. Advances in knowledge organization 1996; 5:370- 7 Woods Requirements‘ for a format for classification data: Final report. sL: lFLA, 1996. http://ifla.inist.fr. Weinberg BH. Library classification and
