9Johan Mannerheim.-The WWW and our digital heritage - the new preservation tasks of the library community. 66th IFLA Council and General Conference.http://www. ifla. org/Ⅳ/ifla66/papers/158 - 157e. htm ;2006 - 02 - 20
10Peter Lyman. Archiving the World Wide Web. http ://www. clir. org/pubs/reports/pub106/web. html,2006 - 02 - 20
