Gustav Spörer (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Gustav Spörer" in Spanish language version.

refsWebsite

Global rank Spanish rank

2books.google.com

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books.google.com

Patrick Moore (1968). «Friedrich Wilhelm Spoerer». The Sun. W. W. Norton & Company. p. 113. ISBN 0393062767.
«The Valz Prize». Popular Astronomy 21. 1913. p. 384.

usgs.gov

planetarynames.wr.usgs.gov

«Spörer». Gazetteer of Planetary Nomenclature (en inglés). Flagstaff: USGS Astrogeology Research Program. OCLC 44396779.

worldcat.org

«Spörer». Gazetteer of Planetary Nomenclature (en inglés). Flagstaff: USGS Astrogeology Research Program. OCLC 44396779.