Tham khảo Harold T. Wilkins

  1. 1 2 Mason, John Alden. (1952). South America—Fact and Fancy. Archaeology. Vol. 5, No. 4. p. 254.
  2. 1 2 Clark, Jerome. (1990). The UFO Encyclopedia. Omnigraphics. p. 403. ISBN 0-7808-0097-4
  3. ↑ McIntee, David. (2016). Fortune and Glory: A Treasure Hunter's Handbook. Bloomsbury Publishing. p. 250. ISBN 978-1-4728-0785-4
  4. ↑ Bryan, George Sands. (1942). Mystery Ship: The Mary Celeste in Fancy and in Fact. Lippincott Company. p. 182
  5. ↑ Spence, Lewis; Fodor, Nandor. (1991). Encyclopedia of Occultism & Parapsychology. Gale Research Company. p. 1035. ISBN 0-8103-4907-8 "The most complete survey is that of Harold T. Wilkins in his book Mysteries Solved and Unsolved (London, 1958; reissued in paperback as Mysteries, 1961)".
  6. ↑ Begg, Paul. Mary Celeste: The Greatest Mystery of the Sea. Pearson Education Limited. tr. 101. 
  7. ↑ The Pan American, Volume 7, Famous Features Syndicate, 1946, p. 11 "Harold T. Wilkins Legend of a Fabulous Empire" discusses Wilkins belief about a "strange white race living in lost cities, amidst the crumbling ruins of once splendid palaces and temples in South America"
  8. ↑ Pennick, Nigel. (1981). The Subterranean Kingdom: A Survey of Man-Made Structures Beneath the Earth. Turnstone Press. p. 82.
  9. ↑ Wilson, Colin. (1992). Unsolved Mysteries. BBS Publishing Corporation. p. 160.
  10. ↑ Kirtley, Bacil F. (1958). Irish Folk Ways by E. Estyn Evans; Folklore of Other Lands by Arthur M. Selvi; Lothar Kahn; Robert C. Soule; A Year-Book of Customs by Christine Chaundler; Mysteries of Ancient South America by Harold T. Wilkins. Western Folklore. Vol. 17, No. 4. pp. 296–298.
  11. ↑ Review: Secret Cities of Old South America. Explorers Journal. Volume 26–31. The Explorers Club, p. 55.
  12. ↑ Coloavito, Jason. (2014). "The Giants of Thera: A Case of Repeated Copying". Retrieved 12 May 2015.