ProQuest will perform maintenance on January 29, 2011 from 9:00 p.m. CST to Sunday, January 30 at 9:00 a.m. CST. 

The following products will be unavailable at that time:

• ProQuest platform products, ProQuest Historical Newspapers
• Chadwyck-Healey products only in North America (International Index to Music Periodicals Full Text, International Index to the Performing Arts)
• UMI products including ProQuest online dissertation products