Related terms:
ipu
cnes
ufo
hynek
oberth
condon
ruppelt
ufology
sturrock
ufologists
allen hynek
sightings
ufo research
condon report
ufo sightings
robertson panel
green fireballs
condon committee
project blue book
ufo investigations
extraterrestrial
extraterrestrial hypothesis
project blue book special report
Wikipedia sources:
Project Blue Book
Ufology
Unidentified flying object
Carl Sagan
Context for words:
ufo
reports
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