Understanding UFO Encounters: Hynek’s Classification System from Sightings to Alien Communication
Understanding UFO Encounters: Hynek’s Classification System from Sightings to Alien Communication
Mon Nov 18, 10:19pm UTC
https://medium.com/@Unsolvedmystery/understanding-ufo-encounters-hyneks-classification-system-from-sightings-to-alien-communication-d5e53012e67e