Llum diürna (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Llum diürna" in Catalan language version.

refsWebsite

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low place

low place

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136^th place

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7^th place

1stjarnhimlen.se

low place

low place

1web.archive.org

1^st place

1^st place

low place

low place

nih.gov

ncbi.nlm.nih.gov

Bunning, Erwin; and Moser, Ilse «Interference of moonlight with the photoperiodic measurement of time by plants, and their adaptive reaction». Proceedings of the National Academy of Sciences of the United States of America, 62, 4, abril 1969, pàg. 1018–1022. PMID: 16591742.

perryton.com

^{[enllaç sense format]} http://www.perryton.com/black.htm

petzl.com

en.petzl.com

«Petzl reference system for lighting performance». Arxivat de l'original el 2008-06-20.

stjarnhimlen.se

Paul Schlyter, Radiometry and photometry in astronomy FAQ (2006)

usgs.gov

volcanoes.usgs.gov

^{[enllaç sense format]} http://volcanoes.usgs.gov/ash/

web.archive.org

«Petzl reference system for lighting performance». Arxivat de l'original el 2008-06-20.