Waters, Donald J.; Commission on Preservation and Access. Electronic technologies and preservation. Commission on Preservation and Access. 1992 [June 8, 2011]. (原始内容存档于2020-10-09).引文使用过时参数coauthors (帮助)
Waters, Donald J.; Commission on Preservation and Access. Electronic technologies and preservation. Commission on Preservation and Access. 1992 [June 8, 2011]. (原始内容存档于2020-10-09).引文使用过时参数coauthors (帮助)