2Steve Lawrence,C.Lee Giles.Accessibility and Distributionof Information on the Web. http://www.nature.com . 2009
3Lopresti Robert,Gorin Marcia.The Availability of U.S.gov-ernment depository publications on the World Wide Web[].Journal of Government Information.2004
4Cho J,Garcia-Molina H.The Evolution Of The Web AndImplications For An Incremental Crawler. http://www.vldb.orgzSzconfzSz2000zSzP200.pdf/cho00evolution.pdf . 2009
5The California Digital Library.Web-Based Government In-formation:Evaluating Solutions for Capture Curation,andPreservation. http://www.cdlib.org . 2009
6Jackson Larry.Statistical Profiles of Web and Metadata Us-age by Two U.S.State Governments. http://www.isrl.uiuc.edu/pep/papers/UIUCLIS_2002_6EARCH/ . 2009
7Bergman Michael K.The Deep Web:Surfacing Hidden Value. http://www.press.umich.edu/jep/07-01/bergm-an.html . 2009
8Michael K.The Deep Web:Surfacing Hidden Value. http://www.press.umich.edu/jep/07-01/bergman.html . 2004
9National Library of Australia and Partners.Selection Guide-lines for Archiving and Preservation by the National Libraryof Australia. http://pandora.nla.gov.au/selectionguid-elines.html . 2009
10Bearman David,Jennifer Trant.Authenticity of Digital Re-sources:Towards a Statement of Requirements in the Re-search Process. http://wwwdlib.org/dlib/june98/06be-arman.html . 2009
