@Misc{BVMC:701810,
author = {Ptolomeo, Claudio},
title = {Claudii Ptolemaei ... Almagestum seu magnae constructionis Mathematicae},
url = {https://www.cervantesvirtual.com/obra/claudii-ptolemaei--almagestum-seu-magnae-constructionis-mathematicae}
}