BIBLIOGRAPHY REFERENCE: BOOK Petri Nonii de crepusculis liber unus. Item Allaceni de causis crepusculorum liber unus Author Pedro Nuñez (Author) Year of Publication 1542 City Lisbonnae Other Numbers 11003 See reference for OpenMind ISMI items with this reference Text: De crepusculis et nubium ascensionibus liber unus
