Nordlige polarsirkel (Norwegian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Nordlige polarsirkel" in Norwegian language version.

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2nwtresearch.com

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2books.google.com

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1auroravillage.info

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1neoprogrammics.com

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1web.archive.org

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auroravillage.info

«40 days without the sun. How? Polar Night begins in Murmansk». Auroravillage.info. 3. desember 2018. Besøkt 24. mars 2022.

books.google.com

Nuttall, Mark (2004). Encyclopedia of the Arctic Volumes 1, 2 and 3. Routledge. s. 115. ISBN 978-1579584368.
Marsh, William M.; Kaufman, Martin M. (2012). Physical Geography: Great Systems and Global Environments. Cambridge University Press. s. 24. ISBN 978-0-521-76428-5.

harvard.edu

adsabs.harvard.edu

Berger, A. L. (1976). «Obliquity and Precession for the Last 5000000 Years». Astronomy and Astrophysics. 51 (1): 127–135. Bibcode:1976A&A....51..127B.

neoprogrammics.com

«Obliquity of the Ecliptic (Eps Mean)». Neoprogrammics.com. Besøkt 13. mai 2014.

nwtresearch.com

Burn, Chris. The Polar Night (PDF). The Aurora Research Institute. Besøkt 28. september 2015.
Burn, Chris. The Polar Night (PDF). The Aurora Research Institute. Besøkt 28. september 2015.

togeo.ru

Всеволод Липатов (26. april 2011). «Город на Полярном круге». ToGeo.ru (på russisk). Arkivert fra originalen 8. august 2014. Besøkt 9. mars 2023.

web.archive.org

Всеволод Липатов (26. april 2011). «Город на Полярном круге». ToGeo.ru (på russisk). Arkivert fra originalen 8. august 2014. Besøkt 9. mars 2023.