6LOCKESS (Lots of Copies Keeps Stuff Safe) http://lockss. stanford, edu/.
7LC21 : ADigital Strategy for the Library of Congress, http://www. nap. edu/html/lc21/
8Guidelines for the Selection of Online Australian Publications Intended for Preservation by the National Library of AUSTRALIA http://pandora.nla. gov. au/selectionguidelines.html.
9M. Bymes. Assigning Permancnce Ratings to NLM's Electronic Publications.http://www.rlg.org/events/prcs-2000/bymes.html.
10Reference Model for an Open Archival Infotmalion System(OAIS). May 1999.http://www. ccsds, org/documents/pdf/CCSDS - 650.(U-R - 1. paf
