Smithsonian Astrophysical Observatory (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Smithsonian Astrophysical Observatory" in Italian language version.

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1web.archive.org

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web.archive.org

A short history of the Smithsonian Astrophysical Observatory, su siarchives.si.edu. URL consultato il 25 novembre 2008 (archiviato dall'url originale il 13 febbraio 2012).