Hall, Richard. Uninvited Guests: A Documented History of UFO Sightings, Alien Encounters and Coverups. Annotated. Paperback.

Hall, Richard. Uninvited Guests: A Documented History of UFO Sightings, Alien Encounters and Coverups. Annotated. Paperback., Volume: Burroughs 143. William S. Burroughs entertainment reading collection, Burroughs. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/579364 Accessed February 14, 2026.