World guide to technical information and documentation services = Guide mondial des centres de documentation et d'information techniques / Guide mondial des centres de documentation et d'information techniques. Unesco. Technology Information services Directories. T10.6 .U5 1975 025.5 UNW English or French. "COM.74/XXIV.II.2/AF." Includes indexes. Paris : Unesco Press, 1975. 1975. 1975 Text 515 p. ; eng engfre Documentation, libraries and archives. Bibliographies and reference works ;