Waters، Donald J.؛ Commission on Preservation and Access (1992). Electronic technologies and preservation. Commission on Preservation and Access. مؤرشف من الأصل في 2020-10-09. اطلع عليه بتاريخ 2011-06-08.
Waters، Donald J.؛ Commission on Preservation and Access (1992). Electronic technologies and preservation. Commission on Preservation and Access. مؤرشف من الأصل في 2020-10-09. اطلع عليه بتاريخ 2011-06-08.