Bortlen asteikko (Finnish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Bortlen asteikko" in Finnish language version.

refsWebsite

Global rank Finnish rank

1skyandtelescope.com

8,316^th place

8,456^th place

1web.archive.org

1^st place

1^st place

1frostydrew.org

low place

low place

frostydrew.org

John Bortle's Dark Sky Scale frostydrew.org. Viitattu 24.9.2011. (englanniksi)

skyandtelescope.com

The Bortle Dark-Sky Scale skyandtelescope.com. Arkistoitu 31.3.2014. Viitattu 23.9.2010. (englanniksi)

web.archive.org

The Bortle Dark-Sky Scale skyandtelescope.com. Arkistoitu 31.3.2014. Viitattu 23.9.2010. (englanniksi)