http://www.helium.com/knowledge/39813-an-introduction-to-parapsychological-and-paranormal-theories.xml Helium.com > Ghosts & Paranormal Phenomena > An introduction to parapsychological and paranormal theories en-us Copyright Helium.com Sun, 15 Feb 2009 07:28:28 GMT Sun, 15 Feb 2009 07:28:28 GMT