Ibid., с цитатами из кн. Richard Mooney, Gods of Air and Darkness (New York: Stein and Day, 1975); The Atlas of Archaeology (Sr Martin Press, 1982), Alastair Service, Lost Worlds (New York; Arco Publishing, 1981); Into the Unknmvn (Rider’s Digest Assoc, 1981); Peter kolosimo, Not of this World (Saecaucus, New Jersey: University Press, 1971); без указания страниц во всех книгах.
