A PDF Book you might like
This comes from the book's Prologue:
" ... UFO reports themselves are generally [not] to be explained in terms of purely psychological causes such as afterimages, perceptual illusions, hallucinations, delusions, or attempts to gain notoriety -- though we must be vigilant for all of these possibilities. There just are too many cases in which correspondences between independent (and sometimes scientifically trained) visual observers and between these and simultaneous radar detections, both in the air and on the ground, point to an objective cause (e. g. Hynek 1972; McDonald 1972; Thayer 1971)"
The various essays in the book, by notable (generally) ufologists, are interesting, even though the essay by R. Leo Sprinkle of the October 1974 Carl Higdon tale seems a little excessive to me. (The "incident" is interesting for a number of reasons and I've dealt with it at this blog in the past, but it is isn't a bedrock case that adds a lot of valuable information to UFO lore, but you decide.)