Apian, Peter, 1495-1552, Gemma, Frisius, 1508-1555, Gemma, Frisius, 1508-1555. Libellus de locorum describendorum ratione, Gemma, Frisius, 1508-1555. Usus annuli astronomici · Antverpiae : Apud Ioannem VVithagium · leaf 17
Si terrct ejjet tetragonJ, \mhra quoque tetragontjejigur^ in eciipfitione Lunari appareret. … Si terra ejjet trigona^ Wihra quoque triangu*larem haheretformulam.
Cosmography · Geography
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