text Paris,France UNESCO 1989 Ind 338 p.: ill.; 29 cm. 338 p.: ill.; 29 cm. UNESCO. Division of Software Development and Applications COMPUTER SOFTWARE CDS/ISIS 681.3.06 INLIS000000000005478 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)