I searched Google. It was faster than searching this thread.
Here is the story:
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TCV News
Columnist Bob Novak Says Joe Wilson Leaked Valerie Plame's CIA Identity
July 11, 2006 06:18 PM EST
by Jim Kouri - Columnist Robert Novak revealed that he discovered Valerie Plame's identity from her husband's -- Joe Wilson's -- entry in "Who's Who in American," in which he mentions her position with the CIA.
Novak said, "I learned Valerie Plame's name from Joe Wilson's entry in 'Who's Who in America,'" according to the Drudge Report.
"Published reports that I took the Fifth Amendment, made a plea bargain with the prosecutors or was a prosecutorial target were all untrue...," said Novak
"My primary source has not come forward to identify himself... Bill Harlow, the CIA public information officer who was my CIA source for the column confirming Mrs. Wilson's identity. I learned Valerie Plame's name from Joe Wilson's entry in 'Who's Who in America'... I answered questions using the names of Rove, Harlow and my primary source... I considered his wife's role in initiating Wilson's mission, later confirmed by the Senate Intelligence Committee, to be a previously undisclosed part of an important news story. I reported it on that basis."
http://www.theconservativevoice.com/article/16032.html
If this references the "Joe Wilson's Entry in Who's Who..." which is Post #41 - there is no mention of the wife's occupation., just her name and date of birth.