Planetary nebula (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Planetary nebula" in English language version.

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archive.org (Global: 6th place; English: 6th place)

  • Osterbrock, Donald E.; Ferland, G. J. (2005), Ferland, G. J. (ed.), Astrophysics of gaseous nebulae and active galactic nuclei, University Science Books, ISBN 978-1-891389-34-4
  • Darquier, A. (1777). Observations astronomiques, faites à Toulouse (Astronomical observations, made in Toulouse). Avignon: J. Aubert; (and Paris: Laporte, etc.).

arxiv.org (Global: 69th place; English: 59th place)

books.google.com (Global: 3rd place; English: 3rd place)

caltech.edu (Global: 887th place; English: 714th place)

authors.library.caltech.edu

doi.org (Global: 2nd place; English: 2nd place)

esahubble.org (Global: low place; English: low place)

eso.org (Global: 3,034th place; English: 2,650th place)

esoads.eso.org

eso.org

ghostarchive.org (Global: 32nd place; English: 21st place)

harvard.edu (Global: 18th place; English: 17th place)

ui.adsabs.harvard.edu

hubblesite.org (Global: 6,632nd place; English: 7,237th place)

klima-luft.de (Global: low place; English: low place)

nasa.gov (Global: 75th place; English: 83rd place)

psu.edu (Global: 207th place; English: 136th place)

citeseerx.ist.psu.edu

qmul.ac.uk (Global: 1,735th place; English: 3,129th place)

maths.qmul.ac.uk

seds.org (Global: 5,388th place; English: 7,494th place)

messier.seds.org

semanticscholar.org (Global: 11th place; English: 8th place)

api.semanticscholar.org

smithsonianmag.com (Global: 503rd place; English: 364th place)

spacetelescope.org (Global: 8,860th place; English: 6,620th place)

u-strasbg.fr (Global: 1,342nd place; English: 1,819th place)

simbad.u-strasbg.fr

uky.edu (Global: 3,273rd place; English: 2,108th place)

uknowledge.uky.edu

unam.mx (Global: 769th place; English: 1,834th place)

astroscu.unam.mx

web.archive.org (Global: 1st place; English: 1st place)