Well I just happened to be in the U of St. Thomas Library (ducking some rain from my bicycle trip). So I'll look up Greer books. I was definitely aware he had written books and I've read his website, which has quite a bit of written material.
As for Rense, well the sources are a director of MUFON who gives his contact info, after pointing out Greer's non-credibility, Dr. Jack Sarfatti -- a physicist involved in this paranormal research who gives the exact email he got from Ed Mitchell and Mitchell's attack on Greer, and Jason Leigh, who also gives his contact info, after pointing out Greer's misuse of information.
Rense just posted those comments -- it's not "written" by Jeff Rense. Obviously anything posted online should be critically analyzed for its sources and this case the sources are valid.
I also pointed out having read a blog entry detailing how most of Greer's employees quite out of disgust for Greer's lack of credibility.
I also pointed out that Greer is a medical doctor which means he has significantly less training than if he was a Ph.D. -- and it doesn't matter if he's a surgeon or a pediatrician, etc.
I've given a detailed analysis of the D.C. Capitol Press Briefing by Greer, et. al. and I didn't rely just on internet links -- I mainly relied on well-documented sources -- books that use declassified documents which are not questionable.
Again the very well documented information that Greer is ignoring is
1) the CIA purposely promoted the "alien invasion" as disinformation and did so in cooperation with the 1200 Nazis the CIA brought to the U.S. -- this is detailed in 3 books by Nick Redfern, the book by Joseph P. Farrell, by Jacque Vallee's "Pentacle Document" that I posted and his book "Messengers of Deception," by George P. Hansen's book at http://tricksterbook.com
, by Greg Bishop, by John Keel, by Nick Cook (whose BBC documentary video is available for FREE on the link in this thread), by Curt Sutherly, and others.
2) The same "alien invasion" disinformation is promoted by the Vatican and by New Age researchers (many of Art Bell's guests, Drunvalo Melchizadek, Jose Arguelles, James Hurtak, etc.) who have worked with the CIA and Freemasons -- this is detailed in "The Stargate Conspiracy" book by Lynn Picknett and Clive Prince. Greer is supported by a former CIA director (who has worked closely with the Nazis), by Claiborne Pell, former chair of the Foreign Relations Committee of the Senate (that worked closely with the CIA-Nazi genocide programs. Pell is funded by Prince Hans Adams, part of the DRAGON COURT (those are your real aliens!!). Pell is one of the central promoters of the "alien invasion" disinformation. Geer is also supported by Carol Rosin who has glad-handed the Nazi war criminal Werner von Braun.