@misc{Roomen_Adriaan_van_(1561-1615)_Specvlvm, author={Roomen, Adriaan van (1561-1615)}, howpublished={online}, publisher={Joannes Masius}, publisher={Levinus Hulsius}, language={lat}, type={starodruk}, title={Specvlvm Astronomicvm, Sive Organvm Forma Mappæ Expressvm : In qvo licet immobili Omnes qvi in Primo cælo, Primoqve mobili spectari solent motus, per Canones ea de re conscriptos, planissime sine ullius regulæ aut volvelli beneficio repræsentantur}, }