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Spreadsheet sabotage Andrew Wahl Canadian Business Online, January 23, 2008
Eight of the Worst Spreadsheet Blunders – Thomas Wailgum , CIO August 17, 2007
How do you know your spreadsheet is right? Principles, Techniques and Practice of Spreadsheet Style Philip L. Bewig — July 28, 2005
ExcelUserGroup.org
DailyDoseOfExcel.com
PowerPivotPro
EXCEL-G: MS Excel General Q & A List
Excel Online Training
EXCEL-L: Microsoft Excel Developers List
Pearson Software Consulting
Office Automation Ltd. - Stephen Bullen's Excel Page