WDB	Libellvs De Locorvm Describendorvm ratione, & de eorum distantiis inueniendis, nunquam antehac visus / Gemma Frisius, Rainer *1508-1555*. - In: Petri Apiani Cosmographia (1540), S.47-53 [more...] Permalink: http://diglib.hab.de/drucke/11-3-astron/start.htm					Deutsch
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