<![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 31-11:1978]]> /cms/render/live/ru/sites/isoorg/contents/data/standard/00/36/3652.html Стандарты ИСО и проекты Ïã¸ÛÁùºÏ²Ê¿ª½±.org 60 /modules/isoorg-template/img/iso/favicon/red/favicon1.ico http://www.iso.org/ <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 31-11:1978]]> <![CDATA[Ïã¸ÛÁùºÏ²Ê¿ª½± 31-11:1978 - Mathematical signs and symbols for use in the physical sciences and technology]]> /cms/render/live/ru/sites/isoorg/contents/data/standard/00/36/3652.html /cms/render/live/ru/sites/isoorg/contents/data/standard/00/36/3652.html 1992-12-30