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In the table of BusinessWeek Online survey results accompanying "It's a whole new Web" (Special Report, Sept. 26, print edition), the tally of readers' favorites under Research should have been 61% for Wikipedia.org and 25% for Answers.com. "Is IPG worth the sum of its parts?" (News: Analysis and Commentary, Sept. 19) stated that the FCB Worldwide unit of Interpublic Group of Companies (IPG
) could "drag the stock down." Although individual units' numbers are not broken out, an official of IPG says FCB had one of its best years ever in 2004. In "Power from the sunbaked desert" (Science & Technology, Sept. 12), the sizes of Stirling dish farms for matching the output of Hoover Dam and of all fossil-fuel-generating plants should have been 11 miles square and 100 miles square, respectively. The review of the book 1491: New Revelations of the Americas Before Columbus ("Cradle of civilization," Books, Sept. 5) should have placed the ancient city of Tiwanaku in what is now Bolivia, not Peru.