The following is a listing of published articles concerning the phenomenon of “Ball Lightning.” This listing can be an important resource for investigators of UFO sightings as they try to determine the identity of a reported UFO because Ball Lightning has the potential for being easily mistaken for other, more anomalous objects.       Ball Lightning is a poorly understood, probably natural phenomenon that may account for some eyewitness reports of the sighting of a UFO. Witnesses to Ball Lightning have described round, glowing objects moving about at fast and at slow speeds. These objects seem to interact with their environment - i.e., they turn corners, avoid obstacles, move along the contours of hilltops, etc. It is easy to imagine eyewitnesses who are unfamiliar with Ball Lighting research to interpret such events as due to ghosts or extraterrestrials and report their sightings this way. Using this listing, investigators can retrieve publications on Ball Lightning and, using the documents themselves, perhaps determine whether this phenomenon is responsible for some reported UFO sightings.       A good portion of information on Ball Lightning comes from obscure scientific and technical journals, often over a hundred years old. Ball Lightning was recognized as a distinct phenomenon by Victorian scientists who often referred to witness reports as examples of a “ball of fire” or “globular lightning.” Even today, the nature of Ball Lightning is not clearly understood.       In the process of doing research for this bibliography, it became apparent that it is becoming more and more difficult to access old literary sources in libraries. As these sources grow older, the libraries are placing them in rare manuscript and book holdings. Direct copying of these documents is generally forbidden at such libraries. Hopefully, a digital run of old journals that will allow open access and preserve these useful and valuable resources will soon appear on the Internet. Otherwise, access to old documents will soon be restricted to those who can afford to travel to locations where the actual documents themselves are stored.   – Barry Greenwood   uhrhistory@comcast.net