Georg Hartmann (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Georg Hartmann" in English language version.

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Dupre, Sven (2003). "The Dioptrics of Refractive Dials in the Sixteenth Century". Nuncius. 18: 39–67. doi:10.1163/182539103X00558.
Chapman, Allan (2007), "Hartmann, Georg (1489–1564)", Encyclopedia of Geomagnetism and Paleomagnetism, Springer Netherlands, pp. 397–398, doi:10.1007/978-1-4020-4423-6_137, ISBN 978-1-4020-3992-8
Lamprey, John (1997). "An Examination of Two Groups of Georg Hartmann Sixteenth-Century Astrolabes and the Tables Used in Their Manufacture". Annals of Science. 54 (2): 111–142. doi:10.1080/00033799700200491.

ART Jonkers (2004), Erdmagnetismus zur Zeit der Seefahrer, PHYSIK JOURNAL, 2004, p. 55-59; fulltext Archived 2005-09-09 at the Wayback Machine

ART Jonkers (2004), Erdmagnetismus zur Zeit der Seefahrer, PHYSIK JOURNAL, 2004, p. 55-59; fulltext Archived 2005-09-09 at the Wayback Machine