NGC 642 (Arabic Wikipedia)

Analysis of information sources in references of the Wikipedia article "NGC 642" in Arabic language version.

refsWebsite
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harvard.edu

ui.adsabs.harvard.edu

  • Lauberts A.; Valentijn E. A. (1989). "The surface photometry catalogue of the ESO-Uppsala galaxies". The Messenger (بالإنجليزية). 56: 31–34. Bibcode:1989ESOLV.C......0L. ISSN:0722-6691. QID:Q66381073.

wikidata.org

  • Lauberts A.; Valentijn E. A. (1989). "The surface photometry catalogue of the ESO-Uppsala galaxies". The Messenger (بالإنجليزية). 56: 31–34. Bibcode:1989ESOLV.C......0L. ISSN:0722-6691. QID:Q66381073.

worldcat.org

  • Lauberts A.; Valentijn E. A. (1989). "The surface photometry catalogue of the ESO-Uppsala galaxies". The Messenger (بالإنجليزية). 56: 31–34. Bibcode:1989ESOLV.C......0L. ISSN:0722-6691. QID:Q66381073.