Pierre Janssen (English Wikipedia)
Analysis of information sources in references of the Wikipedia article "Pierre Janssen" in English language version.
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books.google.com
- Hughes, Stefan (2012). Catchers of the Light: The Forgotten Lives of the Men and Women Who First Photographed the Heavens. ArtDeCiel Publishing. p. 274. ISBN 978-1620509616.
doi.org
- For the name "helium" see also Jensen, William B. (2004). "Why Helium Ends in "ium"". Journal of Chemical Education. 81 (7): 944. Bibcode:2004JChEd..81..944J. doi:10.1021/ed081p944.
- Schmadel, Lutz D. (2007). "(225) Henrietta". Dictionary of Minor Planet Names – (225) Henrietta. Springer Berlin Heidelberg. p. 35. doi:10.1007/978-3-540-29925-7_226. ISBN 978-3-540-00238-3.
gutenberg.org
- "International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the proceedings". Project Gutenberg. 1884. Retrieved 30 November 2012.
harvard.edu
ui.adsabs.harvard.edu
- Kochhar, R.K. (1991). "French astronomers in India during the 17th - 19th centuries". J. Br. Astron. Assoc. 101 (2): 95–100. Bibcode:1991JBAA..101...95K.
- For the name "helium" see also Jensen, William B. (2004). "Why Helium Ends in "ium"". Journal of Chemical Education. 81 (7): 944. Bibcode:2004JChEd..81..944J. doi:10.1021/ed081p944.
- Kochhar, R. K. (1991). "French astronomers in India during the 17th – 19th centuries". Journal of the British Astronomical Association. 101: 95. Bibcode:1991JBAA..101...95K.
mreclipse.com
- Espenak, Fred. "Chronology of Discoveries about the Sun". Mr. Eclipse. Archived from the original on 19 October 2020. Retrieved 6 November 2020.
todayinsci.com
- Tarbell, Ida M. (1894). "The Observatory On Top Of Mont Blanc". todayinsci.com. McClure's Magazine. Retrieved 12 April 2016.
web.archive.org
- Espenak, Fred. "Chronology of Discoveries about the Sun". Mr. Eclipse. Archived from the original on 19 October 2020. Retrieved 6 November 2020.
wikisource.org
en.wikisource.org
- One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Janssen, Pierre Jules César". Encyclopædia Britannica. Vol. 16 (11th ed.). Cambridge University Press. p. 155.
