Osservatorio Sproul (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Osservatorio Sproul" in Italian language version.

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2swarthmore.edu

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1arkansasonline.com

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1dtimeshistory.blogspot.com

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arkansasonline.com

(EN) Large telescope moves to Northwest Arkansas to further STEM recruitment goals, su arkansasonline.com, 30 luglio 2017.

doi.org

dx.doi.org

(EN) Hershey, J. L., Astrometric analysis of the field of AC +65 6955 from plates taken with the Sproul 24-inch refractor., in Astronomical Journal, vol. 78, giugno 1973, Bibcode:1973AJ.....78..421H, DOI:10.1086/111436.

dtimeshistory.blogspot.com

(EN) The Sproul Observatory at Swarthmore College, su dtimeshistory.blogspot.com, 30 marzo 2019.

harvard.edu

adsabs.harvard.edu

(EN) John A. Miller, The Sproul Observatory of Swarthmore College, in Popular Astronomy, vol. 21, maggio 1913, pp. 253 - 262, Bibcode:1913PA.....21..253M.
(EN) Hershey, J. L., Astrometric analysis of the field of AC +65 6955 from plates taken with the Sproul 24-inch refractor., in Astronomical Journal, vol. 78, giugno 1973, Bibcode:1973AJ.....78..421H, DOI:10.1086/111436.

jstor.org

(EN) Frank Schlesinger, The Use of a Photographic Doublet in Cataloguing the Positions of Stars, in Proceedings of the American Philosophical Society, vol. 53, n. 215, dicembre 1914, pp. 303 - 306.

newswire.com

(EN) Historic Giant Telescope Comes to Northwest Arkansas, su newswire.com, 28 luglio 2017.

oadoi.org

(EN) Hershey, J. L., Astrometric analysis of the field of AC +65 6955 from plates taken with the Sproul 24-inch refractor., in Astronomical Journal, vol. 78, giugno 1973, Bibcode:1973AJ.....78..421H, DOI:10.1086/111436.

state.pa.us

legis.state.pa.us

(EN) William Cameron Sproul, su Pennsylvania General Assembly.

swarthmore.edu

(EN) Peter van de Kamp Observatory, su swarthmore.edu.
(EN) Watch: Sproul Observatory Telescope Finds New Home, su swarthmore.edu, 31 luglio 2017.