In an interview with the BBC, Judy Miller admitted that others told her about Valerie Plame.
BBC INTERVIEWER: Who was it who told you that Valerie Plame was a spy?
JUDY MILLER: I don't remember who supplied the name. I remember and I testified before a Grand Jury to who it was that told me that Valerie Plame worked at the agency in the WMD area and that individual was Lewis Libby.. Scooter Libby.
BBC INTERVIEWER: Was there anybody else who named Valerie Plame to you as a CIA agent?
JUDY MILLER: Yes, other people did, but I - my notes - these interviews were two years old. I never wrote a story about it. It wasn't - I didn't consider it very important information at the time and my notes have no indication of who those other people were - and I really couldn't remember.
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BBC INTERVIEWER: But if it was Karl Rove, for example, you'd remember.
JUDY MILLER: I'm not going to talk about who my other sources were or were not.
The BBC article about the interview is here.
The interview was broadcast on BBC on Novemeber 30, 2005, the source information is in the 2nd Miller segment. The interview included questions about Miller's reporting on WDM as well.
Murray Waas also indicated that Miller had other Bush Administration sources in his National Journal article on 10/11/05.
Miller had spent 85 days in jail for contempt of court for refusing to testify before the grand jury about her conversations with Libby and other Bush administration officials regarding Plame.
Waas 10/11/05