WDB	Primitiæ Gnomonicæ Catoptricæ Hoc Est Horologiographiæ Novæ Specvlaris : In qua breuiter noua, certa, exacta, & facilis demonstratur horologiorum per reflexi luminis radium construendorum methodus; ... / Kircher, Athanasius *1602-1680*. - Online-Ausg.. - Avenione : Piot, 1635 Permalink: http://diglib.hab.de/drucke/17-1-astron/start.htm					Deutsch
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