Συμβάν του Βαλ Τζόνσον (Greek Wikipedia)
Analysis of information sources in references of the Wikipedia article "Συμβάν του Βαλ Τζόνσον" in Greek language version.
refsWebsite
Global rank
Greek rank
59th place
419th place
6th place
5th place
archive.org
- Klass, Philip J. (1983). UFOs: the public deceived
. Prometheus Books. ISBN 978-0-87975-322-1.
news.google.com
- «Close encounter makes him famous». Kingman AZ Daily Miner (Western News&Info, Inc.). September 10, 1979. https://news.google.com/newspapers?id=MXczAAAAIBAJ&sjid=v4IDAAAAIBAJ&pg=7008,6959735&dq=val-johnson+ufo&hl=en. Ανακτήθηκε στις 29 December 2010.
- «Officer suffers after encounter with UFO». The Nevada Daily Mail. September 9, 1979. https://news.google.com/newspapers?id=xUIrAAAAIBAJ&sjid=h54FAAAAIBAJ&pg=6131,5359041&dq=val-johnson+ufo&hl=en. Ανακτήθηκε στις 29 December 2010.