Database Software

My question is how to get description like

• Cyrillic Windows 1251
• Eastern European Windows 1250
• Eastern European ISO-8859-2
• Unicode UTF-8

from NLS_CHARSET_ID?

You can find complete list of charest descriptions here: http://www.adp-gmbh.ch/ora/misc/globalization.html

I need to add description column to following query but I don't know how:

SELECT nls_charset_id(value) id, value ORA_CHARSET, utl_i18n.map_charset(value) IANA_CHARSET
FROM v$nls_valid_values
WHERE parameter = 'CHARACTERSET';