@Book{BVMC:631659, author = {Marbode, Obispo de Rennes}, title = {Marbodei Galli poetae vetustissimi De lapidibus preciosis Enchiridion,}, url = {https://www.cervantesvirtual.com/obra/marbodei-galli-poetae-vetustissimi-de-lapidibus-preciosis-enchiridion} }