Virgilio Trettenero (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Virgilio Trettenero" in English language version.

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3books.google.com

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Camuffo, Dario & Phil D. Jones (2002). Improved Understanding of Past Climatic Variability from Early Daily European Instrumental Sources, Springer, 1st ed. p. 49. ISBN 1-4020-0556-3
Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Vol. 1. Springer. p. 839. ISBN 354-000-238-3.
University (Cambridge) Observatory (1857). Astronomical observations made at the Observatory of Cambridge. Deighton. pp. lxvi. OCLC 538061879.

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OSSERVATORIO ASTRONOMICO DI PALERMO GIUSEPPE S. VAIANA. "MICHEZ JACOPO o GIACOMO". OAPa.it. Retrieved 12 July 2012.

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divulgazione.uai.it

Unione Astrofili Italiani. "Il transito di Mercurio osservato da Padova". Unione Astrofili Italiani. Retrieved 12 July 2012.

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University (Cambridge) Observatory (1857). Astronomical observations made at the Observatory of Cambridge. Deighton. pp. lxvi. OCLC 538061879.