{"id":"000224193","type":"article","title":"Las explotaciones antiguas en las minas de Cala","publisher":"Universidad ; Ayuntamiento de Cala","publisher-place":"Huelva","pages":"69-103","container-title":"Metallum : la minería suribérica","author":[{"family":"Pérez Macías","given":"Juan Aurelio"}],"issued":{"raw":"2004"}}