[Author(s)] [Title] HMEPA: Hellenic Month Established Per Athens. [Source] [Volume] [Number] [Publication City] [Publisher] [Date] [Format] (Website) ---------------------------------------- [Author(s)] Langdon, Stephen. [Title] Tablets from the archives of Drehem; with a complete account of the origin of the Sumerian calendar. [Source] ETANA, [Volume] [Number] [Publication City] Paris [Publisher] P. Geuthner [Date] 1911. [Format] (Book) ----------------------------------------