John Playfair (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "John Playfair" in Italian language version.

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archive.org

(EN) details/NHM104643 Playfair, John, Illustrazione della Teoria Huttonian, Cadell & Davies, 1802, Edimburgo. a archive.org

books.google.com

(EN) J. Playfair and Euclid, Elements of geometry; containing the first six books of Euclid, with two books on the geometry of solids. To which are added, elements of plane and spherical trigonometry, J.B. Lippincott & Co, 1860, p. 291. Available online from Google Books. See also Cajori's A History of Mathematics

google.it

books.google.it

web.archive.org

(EN) Copia archiviata, su ewht.org.uk. URL consultato il 2 giugno 2013 (archiviato dall'url originale il 29 agosto 2013).