@Misc{BVMC:256603, author = {Kircher, Athanasius}, title = {Athanasii Kircheri ... Mundus subterraneus in XII libros digestus ... : tomus I.}, url = {https://www.cervantesvirtual.com/obra/athanasii-kircheri-mundus-subterraneus-in-xii-libros-digestus-tomus-i} }