@Misc{BVMC:269025, author = {Gemma Frisius, Rainer}, title = {Gemmae Frisij ... De astrolabio catholico liber quo latissime patentis instrumenti multiplex versus explicatur...}, url = {https://www.cervantesvirtual.com/obra/gemmae-frisij-de-astrolabio-catholico-liber-quo-latissime-patentis-instrumenti-multiplex-versus-explicatur} }