Exoanthropology, the search for other humanities, by Lallá Barretto.
Among the evidences of the presence of extraterrestrial civilizations on our planet, there is information from official protagonists, who took part in the long history of contact between these intelligences and governmental bodies on Earth. These are testimonies from people who were to a greater or lesser degree involved in unofficial or top secret programs of contact with aliens, and who come to the public and reveal to the world the extraterrestial reality. ...