Long delayed echo (Danish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Long delayed echo" in Danish language version.

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4web.archive.org

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Bracewell, R. N. (1960). "Communications from Superior Galactic Communities". Nature. 186 (4726): 670-671. Bibcode:1960Natur.186..670B. doi:10.1038/186670a0. S2CID 4222557.

arrl.org

[1] ARRL: Stan Horzepa, Radio Ghosts (dead link. use https://web.archive.org/web/20031105155129/http://www.arrl.org/news/features/2003/10/31/1/)
ARRL: Stan Horzepa,Long-Delayed Echoes Again (dead link. use https://web.archive.org/web/20091112202151/http://www.arrl.org/news/features/2007/07/06/01/)

books.google.com

Alv Egeland; William J. Burke (20. oktober 2012). Carl Størmer: Auroral Pioneer. Springer Science & Business Media. s. 103–. ISBN 978-3-642-31457-5.

df5ai.net

[2] Arkiveret 8. september 2008 hos Wayback Machine V. Grassmann, Long-delayed radio echoes, Observations and interpretations, VHF Communications, vol. 2, pp. 109-116, 1993.

doi.org

Bracewell, R. N. (1960). "Communications from Superior Galactic Communities". Nature. 186 (4726): 670-671. Bibcode:1960Natur.186..670B. doi:10.1038/186670a0. S2CID 4222557.

harvard.edu

ui.adsabs.harvard.edu

Bracewell, R. N. (1960). "Communications from Superior Galactic Communities". Nature. 186 (4726): 670-671. Bibcode:1960Natur.186..670B. doi:10.1038/186670a0. S2CID 4222557.

la3za.blogspot.com

Sverre Holm, Unusual HF Propagation Phenomena - MDE

semanticscholar.org

api.semanticscholar.org

Bracewell, R. N. (1960). "Communications from Superior Galactic Communities". Nature. 186 (4726): 670-671. Bibcode:1960Natur.186..670B. doi:10.1038/186670a0. S2CID 4222557.

uio.no

mn.uio.no

web.archive.org

[1] ARRL: Stan Horzepa, Radio Ghosts (dead link. use https://web.archive.org/web/20031105155129/http://www.arrl.org/news/features/2003/10/31/1/)
ARRL: Stan Horzepa,Long-Delayed Echoes Again (dead link. use https://web.archive.org/web/20091112202151/http://www.arrl.org/news/features/2007/07/06/01/)
[2] Arkiveret 8. september 2008 hos Wayback Machine V. Grassmann, Long-delayed radio echoes, Observations and interpretations, VHF Communications, vol. 2, pp. 109-116, 1993.
Long Delayed Echo detection automated