List Members,
Since we're talkin' about the underground world of American Indians, well, there's nothing quite like Von Daniken for raw information:
http://pt.scribd.com/doc/10048918/Erich-Von-Daniken-The-Gold-of-the-Gods
Of course, the source of the UFOs is beneath our feet, because there are cavern worlds down there, just ask the Incas, just ask the Aztecs, and just ask the Apaches.
Now, who can volunteer to snoop on, I mean, investigate indian tribes?
Dean