This is a 186 page document from NICAP in 1964. It includes documentation of sightings back to the 40’s. It even includes tic-tac UAP!
https://www.cia.gov/readingroom/docs/CIA-RDP81R00560R000100010001-0.pdf
“Some of the most startling formation cases on record are those in which a large central object is observed in the process of launching or taking on board smaller objects, very much like an aircraft carrier or “mother ship.”
In at least one instance, this phenomenon apparently was recorded on radar. December 6, 1952, over the Gulf of Mexico, the crew of a B-29 on atraining mission repeatedly tracked UFOs moving at high speed past the plane, and crew members reported brief visual sightings of fast-moving lights. Finally the UFOs were seen on the radarscope to merge with a gigantic blip which shot of the scope at about 9,000 mph.
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