In 1974, Don Berliner compiled a list of Blue Book Unknowns for the Fund for UFO Research. He drew it from Air Force Archives files. Cases that Project Blue Book could not explain went onto his list. One was the 1951 New Delhi Flying Club cigar, credited to the FUFOR Index. Another was the 1952 radar-visual sighting at Goose Bay AFB, where GCA confirmed the object. A third was the 1956 Guam intercept by 1st Lt. Ted Brunson in an F-86D. That case sits at number 4577.
Stories3

The New Delhi Flying Club Cigar
32Partially documented
Compiled the list of unexplained Blue Book cases (FUFOR Index) that includes this case

Goose Bay AFB radar-visual sighting: "target suddenly enlarges"
44Partially documented
Compiler of the Blue Book Unknowns listing

Guam F-86D Intercept: 1st Lt. Ted Brunson and Blue Book Unknown 4577
23Thinly documented
Compiled the 1974 Blue Book Unknowns list for the Fund for UFO Research (BBU 4577)